“…In terms of study design, the majority of the studies (12) were cross-sectional [ 10 , 27 – 30 , 32 , 34 , 36 , 40 , 44 , 45 , 48 ], whereas 3 of them were designed as qualitative [ 39 , 43 , 47 ], three studies as pre-and post/interventional [ 8 , 38 , 42 ], one reported retrospective design with existing data [ 46 ] and 7 studies did not report the study design [ 6 , 26 , 31 , 33 , 35 , 37 , 41 ]. At least two studies applied mixed methodology which probably was presented in separate articles [ 8 , 38 – 40 ].…”