1. Department of Neonatology, Christian Medical College, Vellore, India
2. Department of Biostatistics, Christian Medical College, Vellore, India
3. Maternal, Adolescent, Reproductive & Child Health (MARCH) Centre, London School of Hygiene and Tropical Medicine, London, United Kingdom
4. Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom