“…Of these studies, 31 had cross-sectional designs, and two were cohort studies. The studies were conducted in China (n = 18) [ 1 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ], Spain (n = 3) [ 66 , 67 , 68 ], Israel (n = 2) [ 69 , 70 ], Iran (n = 1) [ 71 ], the Philippines (n = 1) [ 72 ], Japan (n = 1) [ 73 ], South Korea (n = 1) [ 74 ], the United States (n = 1) [ 75 ], South Africa (n = 1) [ 76 ], Portugal (n = 1) [ 77 ], Slovenia (n = 1) [ 78 ], Brazil (n = 1) [ 79 ], and Indonesia (n = 1) [ 80 ] ( Table 1 ). The pooled sample size across the included studies was 34,366, with samples ranging from 60 to 7800 participants in individual studies.…”