“…Online Resource 4 gives an overview of the 28 included studies. There were eighth randomized controlled trials 11 , 12 , 22 , 26 , 29 , 35 , 42 , 44 but the majority pre-post evaluations ( n = 14) 23–25 , 27 , 28 , 30 , 31 , 34 , 38–40 , 43 , 45 , 46 and the remaining non-randomized intervention studies ( n = 3) 33 , 36 , 41 or presenting cross-sectional data ( n = 3). 21 , 32 , 37 Seventeen studies were reported in peer-reviewed academic journals, 11 , 12 , 22 , 24–26 , 28–34 , 37 , 43–45 six postgraduate theses 27 , 35 , 36 , 40–42 and five conference abstracts.…”