“…Total 35 studies met the inclusion criteria (Table 1, 2) [2,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58]. Sixteen studies were classified as case-control studies [2,28,29,32,37,38,39,41,42,44,47,49,51,52,54,57] and the rest as observational/cross-sectional studies.…”