London School of Hygiene & Tropical Medicine, London School of Hygiene & Tropical Medicine, London School of Hygiene & Tropical Medicine, University of Cambridge, Jimma University (JU), University of Liverpool, University of Cambridge, The University of the West Indies, The University of the West Indies, University of Southampton, University College London - Great Ormond Street Institute of Child Health, University of Cambridge - Core Metabolomics and Lipidomics Laboratory, Emergency Nutrition Network, Malawi Epidemiology and Intervention Research Unit (MEIRU), London School of Hygiene & Tropical Medicine - Faculty of Epidemiology and Population Health, International Rescue Committee, The University of the West Indies, Kotebe Metropolitan University and London School of Hygiene & Tropical Medicine