“…Twenty individually randomised controlled trials [35],[37],[38],[41],[43],[45],[46],[48]–[51],[56]–[64], six cluster randomised controlled trials [40],[42],[52]–[55], and four non-randomised controlled trials (which used quasi-randomisation methods) [36],[39],[44],[47] were identified. The majority of studies (n = 20) were conducted in the United States [35]–[38],[41],[43],[45]–[47],[50],[51],[54],[56]–[59],[61]–[64], with five studies conducted in the United Kingdom [39],[42],[49],[53],[60], two in the Netherlands [40],[44], and one study each conducted in Poland [55], Canada [48], and New Zealand [52].…”