“…A total of 141 full‐text articles were retained after the screening of titles and abstracts using the exclusion criteria. Full‐text articles were reviewed, and 39 studies meeting the inclusion criteria were included for qualitative and quantitative synthesis 6 , 8 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 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 (Table 1 ). According to the Newcastle–Ottawa Scale, no study had a low risk of bias, 39 had moderate risk, and 1 had high risk of bias 6 , 8 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , …”