[1] Univ Gothenburg, Sahlgrenska Acad, Dept Global Hlth, Gothenburg, Sweden
[2] Univ Cape Town, Fac Hlth Sci, Integrat Biomed Sci Dept, Div Computat Biol, Cape Town, South Africa
[3] Univ Hlth & Allied Sci, Sch Med, Dept Obstet & Gynaecol, Ho, Volta Region, Ghana
[4] Univ Gothenburg, Sahlgrenska Acad, Sect Epidemiol & Social Med, Gothenburg, Sweden