... 17 studies were based on a quasi-experimental design, [17][18][19][20][21][22][23]26,27,29,31,36,37,40,44,48,61 including six uncontrolled before-after studies, [19][20][21]36,37,61 six controlled beforeafter studies, 18,22,23,31,40,44 two cohort studies, 27,29 and three cross-sectional studies. 17,26,48 28 studies were observational, 24,25,28,30,[32][33][34][35]38,39,[41][42][43][45][46][47][49][50][51][52][53][54][55][56][57][58][59][60] including 15 cohort studies 25,30,34,35,39,41,42,45,47,[49][50][51]53,56,60 and 13 cross-sectional studies. 24,28,32,33,38,43,46,52,54,55,[57][58][59] 38 studies were of medium or high quality. ...