“…Out of 17 studies, eight were conducted in India [ 16 – 19 , 21 – 23 , 26 ], two in the UK [ 30 , 31 ], two in the USA [ 28 , 29 ], two in Nigeria [ 20 , 27 ], one in Czech Republic [ 24 ], one in Turkey [ 25 ], and one in Iran [ 15 ]. However, only five studies reported the ethnic group or population affiliation [ 20 – 22 , 24 , 28 ].…”