“…Studies were conducted in Australia (46%), [41][42][43][44][45][46] United Kingdom (15%), 47,48 United States (15%), 49,50 Canada (8%), 31 Japan (8%), 51 and Switzerland (8%). 52 Study designs 38 included cross-sectional studies (46%), 31,43,45,48,51,52 randomized controlled trials (31%), 41,44,46,47 cohort studies (15%), 49,50 and nonrandomized intervention studies (8%). 42 Sample size ranged from 3 to 195, with 92% of the studies having 40 participants or less.…”