G P Segoloni

Ospedale San Giovanni Battista, ACISMOM, Torino, Piedmont, Italy

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Publications (337)730.82 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The Oxford Classification of IgA Nephropathy (IgAN) identified mesangial hypercellularity (M), endocapillary proliferation (E), segmental glomerulosclerosis (S), and tubular atrophy/interstitial fibrosis (T) as independent predictors of outcome. Whether it applies to individuals excluded from the original study and how therapy influences the predictive value of pathology remain uncertain. The VALIGA study examined 1147 patients from 13 European countries that encompassed the whole spectrum of IgAN. Over a median follow-up of 4.7 years, 86% received renin–angiotensin system blockade and 42% glucocorticoid/immunosuppressive drugs. M, S, and T lesions independently predicted the loss of estimated glomerular filtration rate (eGFR) and a lower renal survival. Their value was also assessed in patients not represented in the Oxford cohort. In individuals with eGFR less than 30 ml/min per 1.73 m2, the M and T lesions independently predicted a poor survival. In those with proteinuria under 0.5 g/day, both M and E lesions were associated with a rise in proteinuria to 1 or 2 g/day or more. The addition of M, S, and T lesions to clinical variables significantly enhanced the ability to predict progression only in those who did not receive immunosuppression (net reclassification index 11.5%). The VALIGA study provides a validation of the Oxford classification in a large European cohort of IgAN patients across the whole spectrum of the disease. The independent predictive value of pathology MEST score is reduced by glucocorticoid/immunosuppressive therapy. Keywords: glomerular diseases; IgA nephropathy; progression of chronic renal failure; proteinuria; renal pathology; risk factors
    Kidney International advance online publication. 04/2014;
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    ABSTRACT: Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is a rare disease caused by thymidine phosphorylase deficiency which leads to toxic accumulations of thymidine (dThd) and deoxyuridine (dUrd). It lacks an established treatment and the prognosis is traditionally poor. We report a case of a young female patient with normal renal function and MNGIE treated by peritoneal dialysis (PD) and allogeneic bone marrow transplantation (BMT). PD was effective in reducing dThd and dUrd plasma levels and in improving clinical symptoms. To our knowledge, this is the first report on the beneficial effects of PD regarding MNGIE neurological symptoms. PD, therefore, should be considered especially in medically compromised patients as a supportive treatment to improve clinical conditions before BMT.
    Journal of nephrology 03/2014; · 2.02 Impact Factor
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    ABSTRACT: Pneumotoxic drugs like amiodarone and m-TOR inhibitors (m-TORi) may be administered contemporaneously in therapy for patients who had renal transplants. We present a case of amiodarone pulmonary toxicity (APT) in a patient treated with amiodarone and everolimus. A 57-year-old Caucasian male, under treatment with both everolimus (for 3 years) and amiodarone (for 2 months), presented with fever, dyspnoea and a negative chest X-ray after his second kidney transplant with suboptimal serum creatinine (3 mg/dl). A non-contrastive high-resolution CT scan showed bilateral interstitial lung disease with an associated reduction in carbon monoxide diffusing capacity. Bronchoalveolar lavage (BAL) was negative for an infection, but BAL cytology was suitable for APT (50% of 'foamy' macrophages). A complete recovery was achieved after amiodarone interruption and an oral steroid therapy increase. Everolimus was continued. His kidney function remained unchanged in the upcoming months. In conclusion, we suggest a possible synergistic effect between m-TORi and amiodarone. Furthermore, we propose a diagnostic algorithm that can be used as a surveillance tool to identify a potential initial lung damage in patients treated with 1 or more pneumotoxic drugs.
    Case reports in nephrology and urology. 01/2014; 4(1):75-81.
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    ABSTRACT: Recurrent or "de novo" AA amyloidosis in the renal allograft is rarely described. We describe a case of severe nephrotic syndrome in a recipient of a kidney graft with a previous diagnosis of polycystic nephropathy caused by AA amyloidosis diagnosed only after the renal transplantation. The disease was possibly a tumor necrosis factor receptor-associated periodic syndrome (TRAPS). TRAPS is a rare hereditary inflammatory disease never reported to the best of our knowledge, as a de novo diagnosis in the transplantation setting. Biopsy of the renal graft, indicated for the onset of heavy proteinuria, and genetic investigation provided the clues for diagnosis.
    Transplantation Proceedings 09/2013; 45(7):2778-81. · 0.95 Impact Factor
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    ABSTRACT: Atypical hemolytic uremic syndrome (aHUS), which can recur after renal transplantation, is associated with poor graft outcomes. The underlying genetic defect, namely, mutations in genes coding for the complement factor H, I (CFI), or membrane cofactor protein, greatly impacts the risk of aHUS recurrence. We report here the case of a patient with chronic renal failure due to aHUS in which screening for complement mutations, performed before wait-listing for kidney transplantation, showed a never described previously heterozygous mutation in the exon II of the CFI gene. Specifically, this mutation leads to a substitution of cytosine for guanosine at nucleotide 148, resulting in the change at amino acid 50 from arginine to proline. Subsequently, he received a renal allograft from deceased donor. Good graft function was established immediately, without clinical features of aHUS. Due to a lack of data on this mutation, we avoided prophylactic treatment for aHUS but closely monitored biochemical markers of aHUS to treat a possible recurrence. Immunosuppressive treatment was based on basiliximab, tacrolimus, steroids, and mycophenolic acid. At the time of discharge the serum creatinine was 1.4 mg/dL. Ten months after transplantation the patient is doing well without evidence of aHUS. Our case suggested that a heterozygous mutation in exon II of the CFI gene was not associated with a risk of early post-transplant aHUs recurrence adding new knowledge on complement mutations implicated in aHUS post-transplant recurrences.
    Transplantation Proceedings 09/2013; 45(7):2785-7. · 0.95 Impact Factor
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    ABSTRACT: Epstein-Barr virus (EBV) is a γ-herpes virus, responsible for infectious mononucleosis in immunocompetent hosts. Cellular immunity appears rapidly during EBV primary infection, keeping it silent despite long-life persistence in B lymphocytes. Defects of the EBV-specific cellular immunity are supposed to be the basis of post-transplantation lymphoproliferative disorders, promoted by high levels of immunosuppression. We retrospectively reviewed 197 solid organ transplant recipients to investigate EBV-specific lymphocyte responsiveness using Enzyme-linked ImmunoSpot assay (EliSpot), which assesses the EBV-specific interferon (IFN)-γ producing peripheral blood mononuclear cells, and kinetics of EBV infection/reactivation post-transplantation using quantitative real-time polymerase chain reaction (PCR) on whole blood. Overall, 102 of the 197 patients (51.8%) showed EBV responsiveness at the EBV-EliSpot assay: 68 (66.6%) showed a persistently positive EBV response in 3 or more determinations and 34 (33.3%) had transient episodes of nonresponsiveness. Ninety-five (48.2%) patients were persistently EBV nonresponders. EBV-DNAemia data were available for 58 patients: 27.6% presented at least one episode of EBV-DNA occurrence. No differences were found in EBV-EliSpot response stratification between the groups of patients who experienced episodes of EBV reactivation and those without EBV-DNAemia. However, EBV DNAemia peak values tended to be higher in the first year post-transplantation in the group of patients with a persistent positive EBV-specific immune response. EBV viral load quantitation in blood and EliSpot EBV-specific immune response determination may represent a powerful tool for monitoring solid organ transplant recipients, guiding immunosuppression modulation in patients with active EBV replication.
    Transplantation Proceedings 09/2013; 45(7):2754-7. · 0.95 Impact Factor
  • Article: Preface.
    Giuseppe Paolo Segoloni, Antonio Amoroso, Andrea Ranghino
    Transplantation Proceedings 09/2013; 45(7):2575. · 0.95 Impact Factor
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    ABSTRACT: Introduction: Forgotten indwelling ureteral stents can cause significant urological complications. Only few cases are reported after kindney transplantation. Materials and methods: We present a case of a 39-year-old woman, transplanted in 1993 and referred to our Transplant Center 8 years later, because of a serious urinary tract infection with renal function impairment. Abdominal CT scan showed pyelonephritis and hydronephrosis in the transplanted kidney and the presence of a calcific ureteral stent, which had been forgotten in situ for 8 years. The stent was removed, but it was impossibile to replace it with a new stent both retrogradely and anterogradely, because of a tight obstruction of the mid ureter. So a uretero-ureteral anastomosis with up urinary tract was performed. Results: No intra- or post-operative complications occurred. At 9 years' follow-up, the patient shows an optimal renal function, with no urinary tract infection. Discussion: A forgotten ureteral stent in a trasplanted kidney can cause a lot of complications and can lead to graft loss. The prosthesis may cause an irreversibile ureteral damage, so, as in our experience, forgetting a ureteral stent can result in a complex surgery.
    Urologia 02/2013;
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    ABSTRACT: INTRODUCTION.: The phosphodiesterase type 5 (PDE5) inhibitors are generally well tolerated and effective for treating erectile dysfunction (ED), including in patients with significant comorbidity. Because of this benign safety profile, investigators have used PDE5 inhibitors to treat patients with ED and severe renal disease or those who have received renal transplants. AIM.: To assess safety and efficacy of PDE5 inhibitors in patients receiving dialysis or renal transplants. MAIN OUTCOME MEASURES.: Erectile function as assessed by the International Index of Erectile Function (IIEF) and Global Assessment Questions; adverse events (AEs). METHODS.: We reviewed published studies of PDE5 inhibitors in patients receiving dialysis or renal transplants. RESULTS.: In double-blind, placebo-controlled studies in patients receiving dialysis or renal transplants, sildenafil significantly improved erectile function as assessed by the IIEF, and 75-85% of patients reported improved erectile function on Global Assessment Questions; efficacy was more variable in less well-controlled studies. In >260 patients undergoing dialysis who received sildenafil in clinical studies, there were only six reported discontinuations because of AEs (headache [N = 3], headache and nausea [N = 1], gastrointestinal [N = 1], and symptomatic blood pressure decrease [N = 1]). In approximately 400 patients with renal transplants who received sildenafil, only three patients discontinued because of AEs. Vardenafil improved IIEF scores of up to 82% of renal transplant recipients in randomized, controlled studies (N = 59, total), with no reported discontinuations because of AEs. Limited data also suggest benefit with tadalafil. CONCLUSIONS.: ED is common in patients undergoing renal dialysis or postrenal transplant and substantially affects patient quality of life. Sildenafil and vardenafil appear to be efficacious and well tolerated in patients receiving renal dialysis or transplant.
    Journal of Sexual Medicine 01/2013; · 3.51 Impact Factor
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    ABSTRACT: Comparative analysis of the different subsets of CD4(+) T-lymphocytes may provide hints on the immunologic mechanisms operating in the long-term fate of a kidney transplant. We analyzed peripheral regulatory CD4(+) T cells (Tregs) and CD4(+) cytotoxic T lymphocytes (CTLs) in antibody-mediated chronic rejection (AMCR), in middle-term kidney transplants (2-4years, MTKT) with good graft function and rejection-free history, in long-term kidney transplants (>15years, LTKT) and in normal healthy subjects (NHS). Transplant groups with good prognosis (MTKT and LTKT) displayed a significant lower amount of CD4(+)CD25(high) T lymphocytes than NHS, with a trend of a higher percentage in AMCR than in MTKT and LTKT. However, CD4(+)CD25(high) Foxp3(+) cells were significantly higher in LTKT and MTKT than AMCR. Characterization of CD4(+)CD25(high) T cells showed a marked increase of intracellular CTLA-4 in the AMCR group in respect to the other transplant groups, while the expression of the surface molecule seemed to follow a reverse trend. In addition, CD27, a costimulatory receptor involved in long-term T cell survival and prevention of immune tolerance, is significantly reduced in CD4(+)CD25(high) and CD4(+)Foxp3(+) T cells in the LTKT in respect to the other transplant groups. CD4(+)CD25(high)CD45RO(+) and CD4(+)Foxp3(+)CD45RO(+) regulatory T cells with memory function were increased in LTKT compared to NHS and for the latter also in AMCR group. Finally, CD4(+)CTLs that were quantified on the basis of granzyme A expression, were more represented in AMCR patients in comparison to the other groups. Strikingly, CD27 in the CD4(+)CTLs was suppressed in LTKT and MTKT and markedly expressed in AMCR group. No significant differences in the expression of CD28 were observed among different groups. In conclusion, different profiles of Tregs and CD4(+)CTL populations correlate with different long- term conditions of kidney-transplanted patients, suggesting their role in the development of immunologic events in kidney transplantation.
    Transplant Immunology 11/2012; · 1.52 Impact Factor
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    ABSTRACT: To assess incidence and risk factors for de novo cancers (DNCs) after kidney transplant (KT), we carried out a cohort investigation in 15 Italian KT centres. Seven thousand two-hundred seventeen KT recipients (64.2% men), transplanted between 1997 and 2007 and followed-up until 2009, represented the study group. Person years (PY) were computed from 30days after transplant to cancer diagnosis, death, return to dialysis or to study closure. The number of observed DNCs was compared to that expected in the general population of Italy through standardised incidence ratios (SIR) and 95% confidence intervals (CI). To identify risk factors, incidence rate ratios (IRR) were computed. Three-hundred ninety five DNCs were diagnosed during 39.598PYs, with Kaposi's sarcoma (KS), post-transplant lymphoproliferative disorders (PTLD), particularly non-Hodgkin' lymphoma (NHL), lung, kidney and prostate as the most common types. The overall IR was 9.98/1.000PY, with a 1.7-fold augmented SIR (95% CI: 1.6-1.9). SIRs were particularly elevated for KS (135), lip (9.4), kidney carcinoma (4.9), NHL (4.5) and mesothelioma (4.2). KT recipients born in Southern Italy were at reduced risk of kidney cancer and solid tumors, though at a higher KS risk, than those born in Northern Italy. Use of mTOR inhibitors (mTORi) exerted, for all cancers combined, a 46% significantly reduced risk (95% CI: 0.4-0.7). Our study findings confirmed, in Italy, the increased risks for cancer following KT, and they also suggested a possible protective effect of mTORi in reducing the frequency of post transplant cancers.
    European journal of cancer (Oxford, England: 1990) 10/2012; · 4.12 Impact Factor
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    ABSTRACT: Measurement of inosine-monophosphate dehydrogenase (IMPDH) activity or gene expression was used as a further approach in pharmacokinetics (PK)/pharmacodynamic (PD)-guided Mycophenolate mofetil (MMF) therapy. Forty-four de novo kidney transplant patients were enrolled, 35 of these completed the study, and followed for 24 weeks for clinical status, PK parameters, IMPDH activity and IMPDH1/2 gene expression. IMPDH activity and expression were measured in peripheral blood mononuclear cells before transplant, at week 2-4-12-24, drawing before (t(0)) and two hours (t(2h)) after MMF administration. No significant correlation was found between IMPDH activity/expression and PK parameters. For both genes, significant enhancement in t(2h) expression was observed, then decreases towards week 24 with a trend following steroid dosages. Seven patients experienced acute rejection (AR) and exhibited significantly higher pretransplant expression of both IMPDH1 (median 3.42 vs 0.84; P=0.0025), and IMPDH2 genes (135 vs 104; P=0.0218) with respect to non-rejecting patients. A significant association was also found between pretransplant IMPDH1 mRNA and haematological complications (P=0.032). This study suggests that high steroid dosages may influence IMPDH1/2 expression, hampering their use as a PD biomarker, particularly during the early post-transplant period. The measurement of pretransplant levels of IMPDH1/2 may contribute to prediction of individual drug responsiveness to improve the clinical management of patients in MMF therapy.
    Drug Metabolism and Pharmacokinetics 08/2012; · 2.07 Impact Factor
  • Transplantation 07/2012; 94(2):e12-3. · 3.78 Impact Factor
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    ABSTRACT: The efficacy of islet transplantation is limited by poor graft vascularization. We herein demonstrated that microvesicles (MVs) released from endothelial progenitor cells (EPCs) enhanced human islet vascularization. After incorporation into islet endothelium and beta-cells, EPC-derived MVs favored insulin secretion, survival and revascularization of islets transplanted in SCID mice. MVs induced in vitro islet endothelial cell proliferation, migration, resistance to apoptosis and organization in vessel-like structures. Moreover, MVs partially overcame the anti-angiogenic effect of rapamycin and inhibited endothelial-leukocyte interaction via L-selectin and CD40. MVs were previously shown to contain defined patterns of mRNAs. Here we demonstrated that MVs carried the pro-angiogenic miR-126 and miR-296 microRNAs (miRNAs). MVs pre-treated with RNase or derived from Dicer knocked-down EPCs showed a reduced angiogenic effect. In addition, MVs overcame the anti-angiogenic effect of the specific antagomiRs of miR-126 and miR-296, suggesting a relevant contribution of miRNAs delivered by MVs to islet endothelium. Microarray analysis of MV-stimulated islet endothelium indicated the up-regulation of mRNAs coding for factors involved in endothelial proliferation, differentiation and angiogenesis. In addition, MVs induced the activation of the PI3K-Akt and eNOS signaling pathways in islet endothelium. These results suggest that MVs activate an angiogenic program in islet endothelium that may sustain revascularization and beta-cell function.
    Cell Transplantation 03/2012; · 4.42 Impact Factor
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    ABSTRACT: Proliferative glomerulonephritis with monoclonal IgG deposits (PGNMID) is a rare and recently identified disease with a poor prognosis irrespective of the treatment. Recently, the possibility of recurrent or de novo PGNMID after kidney transplantation has been reported, which is associated with a better prognosis compared to PGNMID on native kidneys. Nevertheless, at present, due to the very few cases of recurrent PGNMID diagnosed, there is no proven effective treatment. Here, we report a case of recurrent PGNMID successfully treated with plasmapheresis, steroids and mycophenolate mofetil. Our report suggests that plasmapheresis might be a valid therapeutic option to treat recurrent PGNMID.
    Case reports in nephrology and urology. 01/2012; 2(1):46-52.
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    ABSTRACT: Paracrine mediators released from endothelial progenitor cells (EPCs) have been implicated in neoangiogenesis following ischemia. Recently, we demonstrated that microvesicles (MVs) derived from EPCs are able to activate an angiogenic program in quiescent endothelial cells by a horizontal transfer of RNA. In this study we aim to investigate whether EPC-derived MVs are able to induce neoangiogenesis and to enhance recovery in a murine model of hindlimb ischemia. Hindlimb ischemia was induced in severe combined immunodeficient (SCID) mice by ligation and resection of the left femoral artery and mice were treated with EPC-derived MVs (MVs), RNase-inactivated MVs (RnaseMVs), fibroblast-derived MVs or vehicle alone as control (CTL). Since MVs contained the angiogenic miR-126 and miR-296, we evaluated whether microRNAs may account for the angiogenic activities by treating mice with MVs obtained from DICER-knock-down EPC (DICER-MVs). The limb perfusion evaluated by laserdoppler analysis demonstrated that MVs significantly enhanced perfusion in respect to CTL (0.50±0.08 vs 0.39±0.03, p<0.05). After 7 days, immunohistochemical analyses on the gastrocnemius muscle of the ischemic hindlimb showed that MVs but not fibroblast-MVs significantly increased the capillary density in respect to CTL (MVs vs CTL: 24.7±10.3 vs 13.5±6, p<0.0001) and (fibroblast-MVs vs CTL: 10.2±3.4 vs 13.5±6, ns); RNaseMVs and DICER-MVs significantly reduced the effect of MVs (RNaseMVs vs CTL: 15.7±4.1 vs 13.5±6, ns) (MVs vs DICER-MVs 24.7±10.3 vs 18.1±5.8, p <0.05), suggesting a role of RNAs shuttled by MVs. Morphometric analysis confirmed that MVs enhanced limb perfusion and reduced injury. The results of the present study indicate that treatment with EPC-derived MVs improves neovascularization and favors regeneration in severe hindlimb ischemia induced in SCID mice. This suggests a possible use of EPCs-derived MVs for treatment of peripheral arterial disease.
    International journal of immunopathology and pharmacology 01/2012; 25(1):75-85. · 2.99 Impact Factor
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    ABSTRACT: A 50-year old female was treated with anidulafungin after fluconazole treatment, for a complex clinical picture and immunosuppression. Anidulafungin was chosen when liver function test was abnormal in a setting of multiple causes of liver toxicity.
    Mycoses 12/2011; 54 Suppl 4:12-5. · 1.28 Impact Factor
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    11/2011; , ISBN: 978-953-307-377-4
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    ABSTRACT: Evaluation of BK virus replication is a fundamental tool in the monitoring of renal transplant recipients. Herein, we investigated the role of urine VP1 messenger RNA (mRNA) quantification and combined measurement of serum DNA and urine VP1 mRNA in 428 kidney allograft recipients. BK viremia and viruria were detected in 24 (5.6%) and 54 (12.6%) patients, respectively. A diagnosis of BKV-associated nephropathy (BKVAN) was established in 2 patients, both within the first year posttransplantation. Based on urine VP1 mRNA measurement, BKV replication was observed in 10 (2.1%) patients, 2 of whom displayed BKVAN. Urine VP1 mRNA was detected in all cases in association with viremia except 5 and in all cases with viruria. No difference among VP1 mRNA levels was noted between the 2 BKVAN patients and the highest values in patients without BKVAN. The urine VP1 mRNA result by analysis using the operating characteristics was not superior to viremia, despite the improvement obtained with the combined measurement of viremia (cut-off, 16,000 copies/mL) and urine VP1 mRNA (>10,000 copies/10(3) cells). In conclusion, VP1 mRNA measurements may complement viremia and viruria to monitor BKV replication, although its use is limited by its technical complexity in comparison with DNA detection.
    Transplantation Proceedings 05/2011; 43(4):1052-4. · 0.95 Impact Factor
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    ABSTRACT: Kidney transplant recipients frequently suffer from skin infections and malignancies, due to the effects of long-term immunosuppressive therapy. Herein, a dermatological screening was performed to evaluate the relationship between risk factors, cutaneous tumours and other skin diseases in a group of 282 kidney transplant patients. Infectious diseases (16.7%) were the most frequent dermatological disorders, whereas cutaneous inflammatory and autoimmune diseases were relatively rare, probably due to an indirect therapeutic role of immunosuppressive regimens. Thirty patients experienced cutaneous side effects from immunosuppressants, mainly when receiving corticosteroids (p = 0.0372). We identified 99 patients (35.1%) who developed cutaneous tumours after transplantation. Cumulative tumour incidence was observed during long-term immunosuppressive therapy; no relationships were identified between skin cancer risk and single class of drug or combination regimens. When we evaluated the eventual relevance of other risk factors for skin cancers, we demonstrated a statistical significance in univariate analysis for male gender, more advanced age at transplantation, long duration of immunosuppressive regimens, no sunscreen usage, outdoor job, absence of cherry angiomas and presence of actinic keratoses (AKs). Age at transplantation (p = 0.0174), presence of AKs (p = 0.0005) and duration of immunosuppression (p = 0.0011) also confirmed their significance in multivariate analysis.
    European journal of dermatology: EJD 02/2011; 21(2):242-7. · 1.95 Impact Factor

Publication Stats

2k Citations
730.82 Total Impact Points

Institutions

  • 2013
    • Ospedale San Giovanni Battista, ACISMOM
      Torino, Piedmont, Italy
    • Azienda Ospedaliera Città della Salute e della Scienza di Torino
      Torino, Piedmont, Italy
  • 1983–2012
    • Università degli Studi di Torino
      • • Dipartimento di Scienze Mediche
      • • Center for Experimental Research and Medical Studies
      • • Dipartimento di Scienze della Sanità Pubblica e Pediatriche
      Torino, Piedmont, Italy
    • San Giovanni Hospital Complex
      Roma, Latium, Italy
  • 2007
    • University of Naples Federico II
      Napoli, Campania, Italy
  • 2005
    • University of Milan
      Milano, Lombardy, Italy
    • The Catholic University of America
      Washington, Washington, D.C., United States
  • 2002
    • University of Bologna
      Bolonia, Emilia-Romagna, Italy
    • Università degli Studi del Sannio
      Benevento, Campania, Italy
  • 2001
    • CILEA Interuniversity Consortium
      Segrate, Lombardy, Italy
  • 1998
    • Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico
      Milano, Lombardy, Italy
    • University of Pavia
      • Department of Diagnostic, Paediatric, Clinical and Surgical Science
      Pavia, Lombardy, Italy
  • 1994
    • Ospedale Maggiore di Lodi
      Lodi, Lombardy, Italy