“…Of the 3918 studies identified by the initial literature searches, 3891 were excluded and 26 RCTs published in English were included. 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 The reasons for exclusion and the corresponding references are reported in the online supplementary file (Supplementary File 2 ). A complete overview of the study selection process is provided in the PRISMA flow diagram (Figure 1 ).…”