... In total, 512 participants of both sexes, with a variety of chronic pain conditions (eg, primary pain, [25][26][27]29,[31][32][33][34][35][36][37][40][41][42][43][44][45][46][47][48]5--57 musculoskeletal pain, 28,39 orofacial pain, 38 provoked vestibulodynia, 30 migraine 49 ) were interviewed. Studies were predominantly conducted in highincome countries such as the United Kingdom (n = 12), 35,36,38,39,[41][42][43][44][45]49,55 Europe (n = 9), 25,31,32,37,40,50,52,53,57 United States of America (n = 4), 27,34,46,47 Australia (n = 4), 26,32,48,56 and Canada (n = 3). 29,30,51 Four studies used mixed-method design, 28,36,39,44 the remaining used a qualitative design only. ...