“…Similarly for blinding of outcome assessment, 7 studies were not blinded 2, 18, 20, 23, 39, 47, 52–54 , 3 studies did not provide information on blinding 21, 51, 52 with only 1 study having blinding for outcome assessment 50 . Attrition bias was low across 10 of the included studies 18, 20, 21, 34, 39, 47, 50–54 with only 1 study having unknown dropout from the RCT 23 . For selective reporting, as most of the studies did not have a protocol, there was unknown risk of bias in 10 studies 18, 20, 21, 23, 34, 39, 47, 50, 51, 53, 54 , with only 1 study, which had a protocol and did not selectively report outcomes 52 .…”