“…Ten studies (11 articles) were conducted in Asia and the Pacific region, six in Africa (4,6,23,(33)(34)(35), one study (two articles) in Caribbean (11,12), and one study in both Zimbabwe and USA (36). Of the 20 articles, eleven employed face to face qualitative interviews (4,11,12,14,23,24,34,(37)(38)(39)(40). Nine articles used quantitative methods (3,5,6,13,25,33,35,36,41), of which seven were cross-sectional (3,5,6,25,33,35,36) and two were prospective cohort studies (13,41).…”