1 Department of Health Policy and Management, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
2 Department of Public Policy, University of North Carolina at Chapel Hill, North Carolina, USA.
3 Adolescent Health Unit, Institute of Child Health, University of Ibadan, Ibadan, Nigeria.
4 Collaboration for Evidence, Research and Impact in Public Health, School of Public Health, Faculty of Health Sciences, Curtin University, Perth, WA, Australia.
5 Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
6 Department of Pediatrics, School of Medicine, Indiana University, Indianapolis, IN, USA; Department of Sociology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA.
7 Department of Public Health Education, University of North Carolina at Greensboro, Greensboro, NC, USA.
8 Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK; Hospital for Tropical Diseases, London, UK.
9 International Centre for Reproductive Health, Department of Public Health and Primary Care, University of Ghent, Ghent, Belgium; Academic Network for Sexual and Reproductive Health and Rights Policy, University of Ghent, Ghent, Belgium.
10 Department of Family Medicine and Primary Care, School of Clinical Medicine, University of the Witwatersrand, Johannesburg, South Africa.
11 Centre for Population, Family and Health, Department of Sociology, University of Antwerp, Antwerp, Belgium.
12 Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK; Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 510095, USA. Electronic address: jdtucker@med.unc.edu.