1. a Maternal, Adolescent and Child Health (MatCH), Department of Obstetrics and Gynaecology , University of the Witwatersrand , Johannesburg , South Africa
2. b Women's Organization Network for Human Rights Advocacy (WONETHA) , Kampala , Uganda
3. c African Sex Worker Alliance , Cape Town , South Africa
4. d International Centre for Reproductive Health (ICRH), Ghent University, Belgium; and African Centre for Migration & Society, University of the Witwatersrand , South Africa
5. e Sexual Rights Centre , Bulawayo , Zimbabwe
6. f Nursing Sciences Department , University of Pretoria , Pretoria , South Africa
7. g Centre for Health Policy, School of Public Health, University of the Witwatersrand, South Africa; and International Centre for Reproductive Health (ICRH), Ghent University, Belgium