“…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 , 56 , 64 , 80 , 81 , 83 ], Saudi Arabia [ 34 – 37 ], Tanzania [ 69 , 74 ], Uganda [ 67 ], UK [ 86 ], and USA [ 50 , 53 , 59 , 62 , 66 , 77 , 79 , 85 , 85 ]. The remaining study was undertaken in both Sierra Leone and the UK [ 48 ].…”