M P Di Simone

University of Bologna, Bolonia, Emilia-Romagna, Italy

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Publications (52)115.32 Total impact

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    ABSTRACT: Intestinal transplantation is gaining worldwide acceptance as the main option for patients with irreversible intestinal failure and complicated total parenteral nutrition course. In adults, the main cause is still represented by short bowel syndrome, but tumors (Gardner syndrome) and dismotility disorders (chronic intestinal pseudo-obstruction [CIPO]) have been treated increasingly by this kind of transplantation procedure. We reviewed our series from the disease point of view: although SBS confirmed results achieved in previous years, CIPO is nowadays demonstrating an excellent outcome similar to other transplantation series. Our results showed indeed that recipients affected by Gardner syndrome must be carefully selected before the disease is to advanced to take advantage of the transplantation procedure.
    Transplantation Proceedings 01/2014; 46(1):245–248. · 0.95 Impact Factor
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    ABSTRACT: Post-transplantation lymphoproliferative disease (PTLD) of the gastrointestinal (GI) tract is often recognized in transplant recipients. Small bowel recipients are prone to develop GI disease due to the higher incidence of Epstein-Barr Virus (EBV) infection and enteritis as a consequence of heavy immunosuppressive regimens. So far treatment has been based on anti-CD20 therapy (Rituximab), modulation of immunosuppression, antiviral therapy (Gancyclovir), and surgery (up to allograft enterectomy if necessary), whereas endoscopy is usually used to perform the diagnosis via biopsy. We report a case of an adult small bowel recipient, who underwent transplantation due to Gardner's Syndrome 6 years earlier and was EBV positive. A native rectal PTLD was treated using opertive endoscopy combined with antiviral therapy using 4 courses of Rituximab for positive pelvic lymph nodes in addition to reduced immunosuppression. Two years after treatment the recipient is alive and disease-free with a functional graft.
    Transplantation Proceedings 11/2013; 45(9):3442-3. · 0.95 Impact Factor
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    ABSTRACT: Steroid-resistant acute cellular rejection (ACR) and chronic rejection (CR) are still major concerns after intestinal transplantation. We report our experience from a single center on 48 adults recipients using 49 grafts from 2001 to 2011, immunosuppressing them initially with daclizumab initially and later Alemtuzumab. Overall patient survival was 41.9% at 10 years while graft survival was 38.5%. The steroid-resistant ACR population of 14 recipients (28.5%) experienced 50% mortality mainly due to sepsis, while the five (8%) CR recipients, included two survivors. All but 1 graft was placed without a liver. CR was often preceded by ACR episodes. Mortality related to steroid-resistant ACR and CR still affects the intestinal transplant population despite induction/preconditioning, especially in the absence of a protective liver effect of the liver. New immunosuppressive strategies are needed.
    Transplantation Proceedings 06/2013; 45(5):2032-3. · 0.95 Impact Factor
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    ABSTRACT: BACKGROUND: Immunohistochemical profiles of esophageal and cardia adenocarcinoma differ according to the presence or absence of Barrett's epithelium (BIM) and gastric intestinal metaplasia (GIM) in the fundus and antrum. Different lymphatic spreading has been demonstrated in esophageal adenocarcinoma. We investigated the correlation among the presence or absence of intestinal metaplasia in the esophagus and stomach and lymphatic metastases in patients who underwent radical surgery for esophageal and cardia adenocarcinoma. METHODS: The mucosa surrounding the adenocarcinoma and the gastric mucosa were analyzed. The BIM+ patients underwent subtotal esophagectomy and gastric pull up, and the BIM- patients underwent esophagectomy at the azygos vein, total gastrectomy, and esophagojejunostomy. The radical thoracic (station numbers 2, 3, 4R, 7, 8, and 9) and abdominal (station numbers 15 through 20) lymphadenectomy was identical in both procedures except for the greater curvature. RESULTS: One hundred ninety-four consecutive patients were collected in three major groups: BIM+/GIM-, 52 patients (26.8%); BIM-/GIM-, 90 patients (46.4%); BIM-/GIM+, 50 patients (25.8%). Two patients (1%) were BIM+/GIM+. A total of 6,010 lymph nodes were resected: 1,515 were recovered in BIM+, 1,587 in BIM-/GIM+, and 2,908 in BIM-/GIM- patients. The percentage of patients with pN+ stations 8 and 9 was higher in BIM+ (p = 0.001), and the percentage of patients with pN+ perigastric stations was higher in BIM- (p = 0.001). The BIM-/GIM- patients had a number of abdominal metastatic lymph nodes higher than did the BIM-/GIM+ patients (p = 0.0001). CONCLUSIONS: According to the presence or absence of BIM and GIM in the esophagus and cardia, adenocarcinoma correspond to three different patterns of lymphatic metastasization, which may reflect different biologic and carcinogenetic pathways.
    The Annals of thoracic surgery 02/2013; · 3.45 Impact Factor
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    ABSTRACT: OBJECTIVES: The misdiagnosis of short oesophagus may occur on recurrence of the hernia after surgery for type II-IV hiatal hernia (HH). The frequency of short oesophagus in type II-IV hernia is undefined. The aim of this study was to assess the frequency of true short oesophagus in patients undergoing surgery for type II-IV hernia. METHODS: Thirty-four patients with type II-IV hernia underwent minimally invasive surgery. After full isolation of the oesophago-gastric junction, the position of the gastric folds was localized endoscopically and two clips were applied in correspondence. The distance between the clips and the diaphragm (intra-abdominal oesophageal length) was measured. When the intra-abdominal oesophagus was <1.5 cm after oesophageal mobilization, the Collis procedure was performed. After surgery, patients underwent a follow-up, comprehensive of barium swallow and endoscopy. RESULTS: After mediastinal mobilization (median 10 cm), the intra-abdominal oesophageal length was >1.5 cm in 17 patients (4 type II, 11 type III and 2 type IV) and ≤1.5 cm in 17 patients (13 type III and 4 type IV hernia). No statistically significant differences were found between patients with intra-abdominal oesophageal length > or ≤1.5 cm with respect to symptoms duration and severity. Global results (median follow-up 48 months) were excellent in 44% of patients, good in 50%, fair in 3% and poor in 3%. HH relapse occurred in 3%. CONCLUSIONS: True short oesophagus is present in 57% of type III-IV and in none of type II HHs. The intraoperative measurement of the submerged intra-abdominal oesophagus is an objective method for recognizing these patients. CLINICALTRIALS.GOV ID: NCT01587859. https://register.clinicaltrials.gov/prs/app/action/SelectProtocol?sid=S0003J7U&selectaction=View&uid=U0000GED&ts=4&cx=uweuc0.
    European journal of cardio-thoracic surgery: official journal of the European Association for Cardio-thoracic Surgery 11/2012; · 2.40 Impact Factor
  • Luca Leuratti, Massimo Pierluigi Di Simone, Stefano Cariani
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    ABSTRACT: BACKGROUND: The aims of this study are to evaluate the macroscopic and microscopic changes in the remnant stomach at mid-term follow-up of patients who underwent a Roux-en-Y gastric bypass on vertical banded gastroplasty (RYGB-on-VBG). The stomach could be reached through a 1.1-cm gastro-gastrostomy with an endoscope of standard size. METHODS: From January 2009 to July 2010, 51 asymptomatic patients at 4 and 5 years follow-up after RYGB-on-VBG submitted to upper endoscopy. All of them were examined with standard endoscopy with collection of biopsies in gastric fundus, body, and antrum. The macroscopic and microscopic findings were analyzed according to Sydney Classification. RESULTS: The endoscopy of the remnant stomach was technically easy and already showed on macroscopic examination 90 % cases of gastritis (41.2 % mild, 49 % severe) with tendency of severity in the distal stomach part. Histological analysis detected 39.2 % of active gastritis, 50.6 % of quiescent gastritis, 7.8 % of intestinal metaplasia, and 3.9 % of lymphoma-like gastritis. CONCLUSIONS: The results surprised us. We found a very high rate of mucosa abnormalities after RYGB-on-VBG. All of the patients have to be regularly controlled in follow-up and treatment has to be introduced when needed. Again, we would like to ask the question: what is happening with the remnant stomach after standard RYGB, banded gastric bapass, or minigastric bypass? Did we reach the time to answer the question?
    Obesity Surgery 11/2012; · 3.10 Impact Factor
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    ABSTRACT: The aim of the present study was to assess the potential barrier effect of Esoxx(®), a new nonprescription medication under development for the relief of gastroesophageal reflux symptoms. Esoxx is based on a mixture of hyaluronic acid and chondroitin sulfate in a bioadhesive suspension of Lutrol(®) F 127 polymer (poloxamer 407) which facilitates the product adhesion on the esophageal mucosa. The mucosal damage was induced by 15 to 90 minutes of perfusion with an acidic solution (HCl, pH 1.47) with or without pepsin (2000 U/mL, acidified to pH 2; Sigma-Aldrich). Mucosal esophageal specimens were histologically evaluated and Evans blue dye solution was used to assess the permeability of the swine mucosa after the chemical injury. The results show that: (1) esophageal mucosal damage is related to the perfusion time and to the presence of pepsin, (2) mucosal damage is associated with an increased permeability, documented by an evident Evans blue staining, (3) perfusion with Esoxx is able to reduce the permeability of the injured mucosa, even after saline washing of the swine esophagus. These preliminary results support further clinical studies of Esoxx in the topical treatment of gastroesophageal reflux symptoms.
    Clinical and Experimental Gastroenterology 01/2012; 5:103-7.
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    ABSTRACT: The prevalence of gastroesophageal (GE) mucosal prolapse in patients with gastroesophageal reflux disease (GERD) was investigated as well as the clinical profile and treatment outcome of these patients. Of the patients who were referred to our service between 1980 and 2008, those patients who received a complete diagnostic work-up, and were successively treated and followed up at our center with interviews, radiology studies, endoscopy, and, when indicated, esophageal manometry and pH recording were selected. The prevalence of GE prolapse in GERD patients was 13.5% (70/516) (40 males and 30 females with a median age of 48, interquartile range 38-57). All patients had dysphagia and reflux symptoms, and 98% (69/70) had epigastric or retrosternal pain. Belching decreased the intensity or resolved the pain in 70% (49/70) of the cases, gross esophagitis was documented in 90% (63/70) of the cases, and hiatus hernias were observed in 62% (43/70) of the cases. GE prolapse in GERD patients was accompanied by more severe pain (P < 0.05) usually associated with belching, more severe esophagitis, and dysphagia (P < 0.05). A fundoplication was offered to 100% of the patients and was accepted by 56% (39/70) (median follow up 60 months, interquartile range 54-72), which included two Collis-Nissen techniques for true short esophagus. Patients who did not accept surgery were medically treated (median follow up 60 months, interquartile range 21-72). Persistent pain was reported in 98% (30/31) of medical cases, belching was reported in 45% (14/31), and GERD symptoms and esophagitis were reported in 81% (25/31). After surgery, pain was resolved in 98% (38/39) of the operative cases, and 79% (31/39) of them were free of GERD symptoms and esophagitis. GE prolapse has a relatively low prevalence in GERD patients. It is characterized by epigastric or retrosternal pain, and the need to belch to attenuate or resolve the pain. The pain is allegedly a result of the mechanical consequences of prolapse of the gastric mucosa into the esophagus.
    Diseases of the Esophagus 11/2011; 25(6):491-7. · 1.64 Impact Factor
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    ABSTRACT: The advent of capsule endoscopy (CE) has resulted in a paradigm shift in the approach to the diagnosis and management of patients with obscure gastrointestinal bleeding (OGIB). With increasing global availability of this diagnostic tool, it has now become an integral part of the diagnostic algorithm for OGIB in most parts of the world. However, there is scant data on optimum timing of CE for maximizing diagnostic yield. OGIB continues to be a challenge because of delay in diagnosis and consequent morbidity and mortality. We evaluated the diagnostic yield of CE in identifying the source of bleeding in patients with OGIB. We identified patients who underwent CE at our institution from May 2006 to May 2011. The patients' medical records were reviewed to determine the type of OGIB (occult, overt), CE results and complications, and timing of CE with respect to onset of bleeding. Out of 346 patients investigated for OGIB, 246 (71.1%) had some lesion detected by CE. In 206 patients (59.5%), definite lesions were detected that could unequivocally explain the OGIB. Small bowel angiodysplasia, ulcer/erosions secondary to Crohn's disease, non-steroidal anti-inflammatory agent use, and neoplasms were the commonest lesions detected. Visualization of the entire small bowel was achieved in 311 (89.9%) of cases. Capsule retention was noted in five patients (1.4%). In this study, CE was proven to be a safe, comfortable, and effective, with a high rate of accuracy for diagnosing OGIB.
    Internal and Emergency Medicine 09/2011; · 2.35 Impact Factor
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    ABSTRACT: Acute cellular rejection (ACR) episodes in intestinal transplant recipients are diagnosed by histologic and clinical findings. We have applied zoom video endoscopy and the use of serologic markers granzyme B (GrB) and perforin (PrF) to monitor rejection together with conventional tools. Seven hundred eighty-two blood samples (obtained at the time of the biopsy) collected from 34 recipients for GrB/PrF upregulation were positive among 64.9% of ACRs during a 3-year follow-up. Considering only the first year results posttransplantation, it reached 73.1% of rejection events. Zoom videoendoscopy was used by our group in 29 recipients of isolated intestine (n = 24) or multivisceral transplantations (n = 5) to enable observation of villi and crypt areas. From more than 270 procedures, 84% of the zoom findings agreed with the histologic results, namely, a specificity of 95%. In fact, during ongoing ACR, villi were altered in 80% of cases. Both procedures were helpful to support conventional histologic findings and clinical symptoms of ACR in intestinal transplant recipients.
    Transplantation Proceedings 07/2008; 40(5):1575-6. · 0.95 Impact Factor
  • Transplantation 01/2008; 86. · 3.78 Impact Factor
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    ABSTRACT: Heller myotomy results for the treatment of sigmoid achalasia are worse than those achieved for fusiform achalasia. We retrospectively examined two groups of sigmoid achalasia patients, in which we performed (1) the standard Heller-Dor procedure (no pull-down) and (2) the Heller-Dor plus a technique apt to obtain the verticality of the oesophageal axis (pull-down). We verified whether the latter technique improved long-term results. We considered 33 patients affected by primitive oesophageal sigmoid achalasia operated upon consecutively (1979-2005). Diagnosis was based on symptoms, manometry, radiology and endoscopy. After 1987, we routinely isolated 360 degrees of the gastro-oesophageal junction and the lower oesophagus and applied U stitches at the right side of the lower oesophagus to pull down and rotate the gastro-oesophageal junction toward the right. Fifteen patients underwent the no pull-down and 18 patients underwent the pull-down technique. Postoperative follow-up included objective clinical and instrumental evaluation (questionnaire filled by a surgeon including the assessment of symptoms and endoscopic reflux oesophagitis according to a semi-quantitative scale) and subjective evaluation (self-evaluation SF-36 questionnaire). The mean follow-up period was 89 months (range 12-261 months). The postoperative dysphagia score was significantly improved in the entire group. Excellent results were present in 12 patients (36.4%), good in 11 (33.3%), fair in 3 (9.1%) and insufficient in 7 patients (21.2%). No statistically significant differences were observed between the two groups with regard to the postoperative symptoms and oesophagitis. Postoperative radiological measurements of oesophageal diameter and residual barium column were significantly improved in the whole group and within each group with respect to the radiological variables measured preoperatively (p=0.000). In the comparison of the two groups, statistically significant differences were observed with regard to mean oesophageal diameter (p=0.030) (pull-down, 4+/-0.9 cm; no pull-down, 4.7+/-0.6 cm) and residual barium column (p=0.048) (pull-down, 6.2+/-3.4 cm; no pull-down, 9.6+/-5.8 cm). The Heller-Dor operation is effective in the presence of sigmoid achalasia. The clinical objective and subjective evaluations show a trend toward the improvement of results with the pull-down technique. Stronger statistical significance would probably be obtained from a larger case series.
    European Journal of Cardio-Thoracic Surgery 01/2008; 32(6):827-33. · 2.67 Impact Factor
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    ABSTRACT: Mammalian target of rapamycin (mTOR) inhibitors have been recently introduced in clinical practice after intestinal transplantation. We focused on Sirolimus (Rapamycin) to examine effects on rejection and graft survival following intestinal transplantation. Twenty isolated intestinal recipients and 5 multivisceral patients (2 with liver) in our series were divided into 3 groups: patients started on Sirolimus (because of nephrotoxicity or biopsy-proven rejection), who continued therapy longer than 3 months (n = 11); patients started on Sirolimus (because of nephrotoxicity or biopsy-proven rejection), who received therapy less than 3 months because of side effects (n = 4); and a control group, who never received rapamycin (n = 10). During prolonged treatment combined with Tacrolimus (Prograf), both Sirolimus groups showed a decreased number of acute cellular rejections (P < .01). Cumulative 3-year graft and patient survival rates were 81% in the Sirolimus greater than 3 months group, 100% in the Sirolimus less than 3 months group, and 80% and 90% in the control group, respectively (P = .63 and P = .62). In our experience, the use of mTOR-inhibitors in combination with calcineurin-inhibitors seemed to be more effective than monotherapy to reduce the number of rejections. Side effects can limit its use as maintenance therapy.
    Transplantation Proceedings 07/2007; 39(5):1629-31. · 0.95 Impact Factor
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    ESTS 15th European Conference on General Thoracic Surgery, Leuven; 06/2007
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    ABSTRACT: The morphologic and immunohistochemical profiles of gastric mucosa and of the tumor were assessed in Siewert type I, type II, and gastric antrum adenocarcinomas. Sixty-two patients, prospectively operated upon, were included in the study: 37 type II, 15 type I, and 10 antrum adenocarcinoma. Samples of the tumor, the surrounding area, and the gastric corpus and antrum were analyzed histologically, and immunostained for cytokeratins (CK)7/20 (staining positive for cells labeled > or = 50%). Among the 37 type II adenocarcinomas were the following: (1) 13 of 37 (35%) had intestinal metaplasia (IM) in the stomach; (2) 24 of 37 (65%) did not show IM at any level; (3) 34 of 37 (92%) had Helicobacter pylori (HP) infection; (4) 13 of 37(35%) had CK7/20 expression of "Barrett's type" (CK7+/20-); 24 of 37 (65%) had a "no Barrett's type" profile (10 of 37 with CK7-/CK20+ and 14 of 37 with CK7+/CK20+); (5) 100% showed the same CK immunoprofile, both in IM and adenocarcinoma (measure of agreement k = 1, p = 0.000). Type I adenocarcinomas showed the following: (1) 87.5% CK Barrett's type, both in the tumor, and in the surrounding IM; (2) 100% gastric samples devoid of both IM and HP infection. Comparison between CK immunoprofiles in type I and type II tumors showed a difference within the two groups (p = 0.002). One hundred percent of antrum adenocarcinomas showed a no Barrett's type CK profile, both in the tumor and in the IM of the entire stomach. Data suggest that type II adenocarcinoma cannot be always considered a gastroesophageal reflux disease-related tumor; other pathogenetic pathways should be taken into consideration.
    The Annals of thoracic surgery 05/2007; 83(5):1814-9. · 3.45 Impact Factor
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    XXII Congresso Nazionale GISMAD, Gardone Riviera; 04/2007
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    ABSTRACT: IntroductionInduction therapy has been recently adopted for intestinal transplant.Patients and methodsWe compared during first 30 days post-transplantation 29 recipients, allocated in two groups, treated with Daclizumab (Zenapax®) or Alemtuzumab (Campath-1H®).ResultsDuring first month, 45% of Daclizumab recipients experienced six acute cellular rejections (ACRs) of mild degree, while 63% of them developed an infection requiring treatment. We found three acute cellular rejections in 17.6% of Alemtuzumab recipients, two with moderate degree; 64.7% of them required treatment for infection.Discussion and conclusionsGraft and patient 3-years cumulative survival rate were not significantly different between groups. Alemtuzumab seems to offer a better immunosuppression during first month.
    Digestive and Liver Disease 04/2007; · 3.16 Impact Factor
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    ABSTRACT: Recently, new immunosuppressive protocols after intestinal transplantation have been proposed to avoid steroids use and their adverse effects. We evaluated the impact of steroids on survival and post-transplant complications in our experience. In our retrospective study we considered the mean daily dosage of steroids received by 25 patients after intestinal/multivisceral transplantation (minimal follow-up was six months). We analyzed graft and patient survival rates, correlation with rejection and infectious episodes and steroids side effects. After a mean follow-up of three yr, we did not find any significant difference in steroid doses between our immunosuppressive protocols. Patients with a mean dosage of prednisone higher than 20 mg/d experienced a lower graft (p = 0.009) and patient (p = 0.02) survival rate. The side effects of steroids after transplant were similar. Infections were more frequent during steroids administration (p = 0.04). Discussion and conclusion: Steroids therapy may be useful to treat acute rejection, but in our experience high steroids regimen did not improve graft and patient survival, increasing infectious rate. We assumed that high dose of steroids can be avoided as maintenance therapy, except in selected cases.
    Clinical Transplantation 02/2007; 21(2):265-8. · 1.63 Impact Factor
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    ABSTRACT: Purpose: Mammalian target of rapamycin (mTOR) inhibitors have been recently introduced in clinical practice after intestinal transplantation. We focused on Sirolimus (Rapamycin) to examine effects on rejection and graft survival following intestinal transplantation. Patients and methods: Twenty isolated intestinal recipients and 5 multivisceral patients (2 with liver) in our series were divided into 3 groups: patients started on Sirolimus (because of nephrotoxicity or biopsy-proven rejection), who continued therapy longer than 3 months (n = 11); patients started on Sirolimus (because of nephrotoxicity or biopsy-proven rejection), who received therapy less than 3 months because of side effects (n = 4); and a control group, who never received rapamycin (n = 10). Results: During prolonged treatment combined with Tacrolimus (Prograf), both Sirolimus groups showed a decreased number of acute cellular rejections (P < .01). Cumulative 3-year graft and patient survival rates were 81% in the Sirolimus greater t
    Transplantation Proceedings. 01/2007; 39:1629-1631.
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    ABSTRACT: Nowadays the subjective assessment of Health-Related Quality of Life after surgery for achalasia is often associated with the instrumental methods in order to evaluate long-term results of therapy. To assess the long-term objective and subjective results of the surgical treatment of achalasia and to study the correlation between clinical-instrumental methods and those based on the patient's self-assessment and on Health-Related Quality of Life questionnaires. One hundred and twenty-four patients consecutively submitted to trans-abdominal Heller-Dor operation were periodically followed up with clinical examination, endoscopy, barium swallow and manometry. The Health-Related Quality of Life was assessed using the 36 item short form (SF-36) and the Psychological General Well-Being Index questionnaire. The statistical comparison between the results of the self-assessment questionnaires and the long-term clinical-instrumental result was calculated by means of linear regression analysis. Over the years, 123 patients underwent at least one complete clinical-instrumental check-up and filled the self-assessment questionnaires. Mean follow-up was 105 months (range 12-288) with a median of 82.5 months. The result of the surgery was considered satisfactory in 93.5% of the patients, while the reflux oesophagitis observed in 6.5% of the cases was the main cause of failure. Clinical scores for dysphagia and for gastro-oesophageal reflux symptoms were significantly reduced after surgery. The results of the SF-36 and Psychological General Well-Being Index questionnaires were in our population very high and clinical correlation (p<0.05) emerged in physical function, in role physical, in mental health and in vitality domains of SF-36 questionnaire, and in self-control and general health scales of Psychological General Well-Being Index questionnaire. Health-Related Quality of Life questionnaires can be considered valid aids in evaluating surgical results, but the clinical-instrumental evaluation remains the cardinal point of every long-term assessment in order to diagnose complications, the disease-related conditions of the patient and to acquire reliable data on which scientific discussion can be based.
    Digestive and Liver Disease 08/2006; 38(8):544-51. · 3.16 Impact Factor

Publication Stats

367 Citations
115.32 Total Impact Points

Institutions

  • 1987–2012
    • University of Bologna
      • Department of Experimental, Diagnostic and Specialty Medicine DIMES
      Bolonia, Emilia-Romagna, Italy
  • 2011
    • Columbia University
      New York City, New York, United States
  • 2007
    • Policlinico S.Orsola-Malpighi
      Bolonia, Emilia-Romagna, Italy