“…A total sample of 8,771 participants was included in the systematic review. These studies were conducted in many countries worldwide including in China ( 13 , 40 , 43 ), France ( 37 , 39 , 48 , 50 ), India ( 42 ), Iran ( 51 ), Italy ( 32 , 33 , 46 ), the Netherlands ( 34 ), Philippines ( 52 ), Spain ( 44 , 53 ), Turkey ( 58 ), UK ( 41 , 55 ), and the USA ( 21 , 35 , 36 , 45 , 47 , 49 , 54 , 56 , 57 ). Out of 27 studies, eight studies were of retrospective cohort study design, 11 were case series, and nine were case reports.…”