“…The trial designs included parallel group, [22-27,29,30,35,37,38] cluster [20,28,33] and factorial [31,32,36] design RCTs. The studies were undertaken in Australia, [20,22,25,32,33] the Netherlands, [24,26,38] New Zealand, [31] Switzerland, [35,36] Germany, [37] Sweden, [29] Taiwan [27,28] and the USA [23,30]. A total of 5034 participants were included, with sample sizes ranging from 24 [35] to 1,107 [32].…”