“…Among the 18 eligible studies, only one was a retrospective cohort study [ 50 ]. The other studies were cross-sectional [ 35 , 36 , 40 , 42 ] and case-control [ 33 , 34 , [37] , [38] , [39] , 41 , [43] , [44] , [45] , [46] , [47] , [48] , [49] ]. Two studies [ 33 , 34 ] did not report the following ethical criteria in their execution, and only three studies [ 38 , 43 , 50 ] reported the use of the STROBE statement [ 51 ] as a reporting guide.…”