1. Centre for Global Child Health, Hospital for Sick Children, Toronto, Ontario, Canada
2. Division of Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, Toronto, Ontario, Canada
3. Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
4. Department of Paediatrics, Queen Elizabeth Central Hospital, Blantyre, Malawi
5. School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
6. Department of Surgery, College of Medicine, Blantyre, Malawi
7. Malawi-Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
8. Department of Biomedical Sciences, College of Medicine, University of Malawi, Blantyre, Malawi
9. Department of Clinical Dietetics, Hospital for Sick Children, Toronto, Ontario, Canada