“…In the domain of “bias arising from randomization process”, 2 studies had low bias 22 , 27 , and 8 had some bias 21 , 25 , 26 , 28 – 32 . In the domain of “bias due to deviations from intended interventions, 3 studies had high bias 26 , 28 , 29 , 2 had some bias 31 , 32 and 5 had low bias 21 , 22 , 25 , 27 , 30 . In the domain of “bias due to missing outcome data”, 3 had some bias 26 , 28 , 29 , and 7 had low bias 21 , 22 , 25 , 27 , 30 – 32 .…”