1 Department of Women & Children's Health, School of Life Course & Population Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK. Electronic address: cristina.fernandez_turienzo@kcl.ac.uk.
2 Department of Women & Children's Health, School of Life Course & Population Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK.
3 Welbodi Partnership, Freetown, Sierra Leone.
4 Lifeline Nehemiah Projects, Freetown, Sierra Leone.