“…The quality of evidence was low quality in 57.6% (n = 19) [ 6 , 10 , 11 , 16 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ] and very low quality in 42.4% (n = 14) [ 7 , 8 , 33 , 34 , 35 , 36 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 ] of studies, respectively ( Table 3 ). A total of 78.8% of the articles had a low risk of bias (n = 26) [ 6 , 7 , 8 , 10 , 11 , 16 , 33 , 34 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ,…”