1. UCL Elizabeth Garrett Anderson Institute for Women’s Health, University College London, London, UK
2. Department of Primary Care and Population Health, University College London, Royal Free Hospital, London, UK
3. UCL Interaction Centre (UCLIC), University College London, London, UK
4. Institute for Global Health, University College London, London, UK
5. Department of Social Science, UCL Institute of Education, University College London, London, UK
6. Health Economics, University College London, London, UK
7. Institute of Health and Community, University of Plymouth, Plymouth, UK
8. PRIMENT Clinical Trials Unit, Department of Primary Care and Population Health, University College London, Royal Free Hospital, London, UK
9. Africa Centre for Evidence, Faculty of Humanities, University of Johannesburg, Johannesburg, South Africa