“…The number of participants ranged from 6 [41] to 5963 [43] participants. Twenty-nine studies focused on one ethnic group [27, 30–36, 39, 41, 42, 47–49, 51, 57, 69, 75, 77–80, 82–85, 87, 89, 92] while thirty-three included more than one ethnic group [28, 29, 37, 38, 40, 43–46, 50, 52–56, 58–68, 70–73, 86, 91, 93] and five studies did not report the ethnicity of their participants [74, 76, 81, 88, 90].…”