“…Sixteen studies [ 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ] were excluded as the data were not harmonious to calculate the effect size in the form of correlation. Five studies [ 87 , 88 , 89 , 90 , 91 ] were disqualified because of their study design, which was not well-suited with the study in progress.…”