“…Of the 53 empirical studies, 42 (79%) were qualitative studies [ 34 – 36 , 38 – 44 , 47 , 48 , 50 – 52 , 54 – 58 , 60 , 62 – 67 , 69 , 71 – 77 , 79 – 81 , 83 – 86 ], 6 (12%) used a mixed methods approach [ 45 , 46 , 53 , 59 , 61 , 68 ], and 5 (10%) were quantitative [ 37 , 49 , 70 , 78 , 82 ]. 7/56 empirical studies, all qualitative interview studies, recruited participants internationally with no specific location stated [ 40 , 54 , 55 , 58 , 60 , 63 , 73 ]. Of the remaining studies, all but one were single-country studies: Botswana [ 75 ], Canada [ 41 , 65 ], China [ 57 ], Denmark [ 39 , 43 ], Dominican Republic [ 44 ], Germany [ 51 , 84 ], India [ 61 ], Iran [ 38 , 46 , 49 , 68 , 70 – 72 , 78 , 82 , 98 ], Italy [ 45 ], Mexico [ 87 ], the Netherlands [ 76 ], New Zealand [ 47 ], Norway [ 42 , 52 , …”