1. 1Centre for Health Research and Development, Society for Applied Studies, New Delhi, India;
2. 2Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology, Tampere University, and Tampere University Hospital, Finland;
3. 3DBT/Wellcome India Alliance Clinical and Public Health Fellow;
4. 4Centre for Intervention Science in Maternal and Child Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway;
5. 5Cluster for Global Health, Division for Health Services, Norwegian Institute of Public Health, Oslo, Norway;
6. 6Clinical and Research Laboratories, Society for Applied Studies, New Delhi, India;
7. 7Department of Maternal, Newborn, Child and Adolescent Health, World Health Organization, Geneva, Switzerland