“…Table 1 describes the papers included in the systematic review. Twenty-seven papers reported data from RCTs conducted in the UK [28,29,[45], [46], [47], [48], [49], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59]] and Europe [38,40,41,[60], [61], [62], [63], [64], [65], [66]], 16 from RCTs conducted in the USA and Canada [39,42,43,[67], [68], [69], [70], [71], [72], [73], [74], [75], [76], [77], [78], [79]], seven in countries outside of North America and Europe [30,[80], [81], [82], [83], [84], [85]], and two papers reported RCTs collecting data internationally [86,87]. Most papers were published from the year 2000 onwards (n = 42).…”