“…Characteristics of included studies are shown in Table 2 . Among the eight studies included, 8 , 9 , 23 , 24 , 25 , 26 , 27 , 28 six studies 8 , 24 , 25 , 26 , 27 , 28 utilized prospective observational study design while the remaining two studies 9 , 23 used a retrospective study design. All the studies selected were primary studies carried out in South Asian countries.…”