“…The 27 studies included in the review consisted of 17 qualitative studies [1, 8, 13, 16, 18, 19, 21, 27–36], 9 cross-sectional studies [9, 14, 15, 17, 37–41], and 1 cohort study [42]. Most study populations were based in South Africa [16, 18, 29, 30, 36, 37], Kenya [21, 32–34, 41] and Nigeria [9, 14, 15, 40]; other countries included Ethiopia [27, 38], Malawi [8, 19], Tanzania [17, 35], Uganda [42], Botswana [39], Democratic Republic of Congo [31], Ghana [28], Zambia [1], and one study was generalised over Sub-Saharan Africa [13].…”