“…The sample size ranged from 164,101 ( 100 ) to 18 ( 40 ) participants. In terms of quality assessment, there were a total of 2 unsatisfactory studies ( 51 , 91 ), 36 satisfactory studies ( 21 , 23 , 25 , 26 , 28 , 33 , 36–38 , 40 , 41 , 43 , 44 , 47 , 48 , 52–57 , 59–64 , 67 , 68 , 71 , 77 , 78 , 81–83 , 92 ), 42 good-quality studies ( 22 , 24 , 27 , 29–32 , 34 , 39 , 42 , 45 , 46 , 49 , 50 , 57 , 58 , 61 , 65 , 66 , 69 , 70 , 72–74 , 76 , 79 , 80 , 84–90 , 93–98 , 100 ), and 2 very good-quality studies ( 35 , 99 ). Tables 1 – 5 show further details on the characteristics of the included studies.…”