“…Twenty-one journal articles, two policy submissions [ 45 , 46 ], and one discussion paper [ 47 ] were included in the review. Of the included journal articles, nine were qualitative [ 31 – 34 , 36 , 38 , 41 , 44 , 48 ], three quantitative [ 35 , 37 , 40 ], four narrative reviews [ 43 , 50 , 52 , 53 ], one systematic review [ 51 ], one qualitative evidence synthesis [ 42 ], one quantitative research proposal [ 39 ], one commentary [ 18 ], and one editorial [ 49 ]. A range of sampling methods were used in the 12 primary studies: four used purposive sampling [ 32 , 33 , 36 , 48 ]; three used a combination of purposive and convenience sampling [ 31 , 38 , 44 ]; three used voluntary response [ 34 , 37 , 40 ]; one used convenience sampling alone [ 35 ]; and one used relational sampling [ 41 ](p4).…”