1. Department of Global Women’s Health, The George Institute for Global Health, Imperial College London, London, UK
2. Nuffield Department of Women’s and Reproductive Health, University of Oxford, Women’s Centre, John Radcliffe Hospital, Oxford, UK
3. Sera Prognostics, Inc, Salt Lake City, Utah, USA
4. Department of Obstetrics and Gynaecology, Tu Du Hospital, Ho Chi Minh City, Viet Nam
5. Clinical Trials Unit, Oxford University Clinical Research Unit, Ho Chi Minh City, Viet Nam
6. Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK