1. Muhimbili Wellcome ProgrammeMuhimbili University of Health and Allied SciencesDar‐es‐Salaam Tanzania
2. Department of Biological SciencesDar es Salaam University College of Education, Dar es Salaam Tanzania
3. Nuffield Department of MedicineUniversity of Oxford United Kingdom
4. Division of Cancer StudiesMolecular Haematology, King's College LondonLondon United Kingdom
5. Department of Haematological MedicineKing's College Hospital NHS Foundation TrustLondon United Kingdom
6. Faculty of Epidemiology & Population HealthMRC International Nutrition Group, London School of Hygiene & Tropical MedicineLondon United Kingdom