“…Studies were set in a number of countries including (in order of frequency) South Africa [ 12 , 17 , 20 , 40 , 41 , 51 , 57 , 62 ], Kenya [ 12 , 17 , 50 , 53 , 58 , 61 , 63 ], Uganda [ 12 , 14 , 17 , 42 , 43 , 52 , 54 ], Malawi [ 12 , 17 , 21 , 23 , 24 , 27 ], Tanzania [ 12 , 13 , 17 , 44 , 56 ], Cameroon [ 12 , 15 , 17 , 64 ], Zambia [ 12 , 19 , 39 ], India [ 15 , 17 , 64 ], Democratic Republic of Congo [ 12 , 17 , 49 ], Mozambique [ 26 , 46 , 48 ], Brazil [ 25 , 51 , 60 ], Ethiopia [ 55 , …”