“…Out of the eligible 29 studies, eight studies have a high risk of bias, 21,31,32,34,36,37,40,45 seven studies have an unclear risk of bias 22,27,28,30,38,39,44 and 14 studies are having low risk of bias. 20,[23][24][25][26]29,33,35,[41][42][43][46][47][48] Some of the reasons for the high risk of bias were selection bias, 21,27,28,32,34,[36][37][38]40,45 F I G U R E 1 Schematic flow diagram of studies search. T A B L E 1 (Continued) performance bias, 31,37,40 detection bias 22,31,32,36,37,39,40,45 an...…”