“…Most were of case-series ( n = 13) [ 32 , 33 , 34 , 36 , 38 , 40 , 41 , 42 , 43 , 44 , 53 , 55 , 56 ] and cross-sectional design ( n = 11) [ 29 , 31 , 39 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. Other study designs included: case-control ( n = 5) [ 35 , 54 , 58 , 59 , 60 ], retrospective review ( n = 2) [ 37 , 57 ], and prospective/retrospective cohort ( n = 1) [ 30 ]. Seven studies [ 31 , 46 , 47 , 48 , 49 , 50 , 52 ] reported comparable prevalence; however, only one study reported birth years [ 52 ].…”