“…Full trial characteristics are shown in Table S2 (including population, sample size, details of the intervention and control, outcome measures, and process indicators). Twelve trials [ 5 , 38 , 39 , 41 , 42 , 44 , 45 , 46 , 47 , 48 , 49 , 52 ] were randomised controlled trials (RCTs), three were cluster RCTs [ 40 , 50 , 51 ], and one was a non-randomised controlled trial [ 43 ]. Most trials were conducted in the USA [ 5 , 40 , 42 , 43 , 44 , 45 , 47 , 48 , 49 , 51 ], with the remaining trials in China [ 38 , 39 , 41 , 52 ], Germany [ 46 ], and Spain [ 50 ].…”