1. Department of Public Health and Nursing, Norwegian University of Science and Technology, 7491 Trondheim, Norway
2. Department of Laboratory Medicine, University Hospital of North Norway, 9038 Tromsø, Norway
3. School of Maternal, Neonatal and Reproductive Health, Kamuzu University of Health Sciences, Blantyre 312225, Malawi
4. Directorate of Research and Outreach, Malawi University of Science and Technology, Thyolo 310106, Malawi
5. Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre 312233, Malawi
6. Department of Obstetrics and Gynaecology, St. Olav’s Hospital, 7030 Trondheim, Norway
7. Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, UK
8. School of Life Sciences and Health Professions, Kamuzu University of Health Sciences, Blantyre 312225, Malawi
9. School of Health Systems and Public Health, Faculty of Health Sciences, University of Pretoria, Pretoria 0002, South Africa
10. Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, 5009 Bergen, Norway