“…Five of fourteen trials [ 10 , 12 , 15 , 16 , 19 ] reported the specific methods used for randomization, while the remaining included trials [ 8 , 9 , 11 , 13 , 14 , 17 , 18 , 20 , 21 ] did not mention that. Three trials [ 10 , 12 , 15 ] described the allocation concealments in detail, two trials [ 11 , 14 ] did not use allocation concealments, and allocation concealments were not described in the remaining trials. [ 8 , 9 , 13 , 16 – 21 ] Blinded methods were used in four trials, three of which [ 10 , 12 , 13 ] used a blinded approach for investigators, participants and outcome assessors, while one trial [ 17 ] was only blinded for outcome assessors.…”