“…The risk of bias was judged as of low level for the 26 studies we included [20, 21, 23-25, 38-42, 44-48, 51, 52, 54, 57, 59, 61-63, 66, 67, 69]. It was moderate (i.e., some concerns) and high levels in 11 [22,43,50,53,55,56,58,60,64,65,70] and two [49,68] of the remaining studies, respectively. Most studies had a low or moderate risk of participant selection bias, while this was of a high level in nine studies [20, 21, 23, 49, 52, 58, 62, [53,55,56,60,64,68,69,71].…”