1. Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
2. Endemic, Neglected, Emerging and Re-emerging Infections Programme, MRC/UVRI Uganda Research Unit, Entebbe, Uganda
3. Maternity Department, Entebbe Hospital, Entebbe, Uganda
4. Department of Paediatrics, Mulago Hospital, Kampala, Uganda
5. Department of Non-communicable Disease Epidemiology
6. Department of Clinical Research, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK