Acknowledgement
P.
The authors acknowledge the core support provided by the Department of Maternal, Newborn, Child and Adolescent Health, and the WHO, Geneva (WHO Collaborating Centre IND-158). We also acknowledge the support extended by the Knowledge Integration and Technology Platform (KnIT), a Grand Challenges Initiative of the Department of Biotechnology and Biotechnology Industry Research Assistance Council (BIRAC) of the Government of India, and the Bill & Melinda Gates Foundation (USA).This study received funding from the Thrasher Research Fund (Award number 15093). The primary trial (IMPRINT) within which this study was nested had received funding from the Bill and Melinda Gates Foundation through the Biotechnology Industry Research Assistance Council (BIRAC) of the Department of Biotechnology, Government of India (OPP1177843).S. T., N. B., R. P. U. and R. B. designed the research; S. T., R. P. U., N. B. conducted the research; T. A. S., M. H., B. K. and R. B. provided technical inputs in study implementation and conduct of neurodevelopmental assessments; R. P. U, S. T., T. A. S. and M. H. analysed the data or performed statistical analysis; R. P. U., S. T., T. A. S. and M. H. prepared the manuscript. All the authors were responsible for the final content of this manuscript.This study was conducted according to the guidelines laid down in the Declaration of Helsinki, and all procedures involving human subjects/patients were approved by the ethics committee of the Centre for Health Research and Development, Society for Applied Studies, India (SAS/ERC/IMPRINT-FU/2019) and Regional committees for medical and health research ethics (REK), Norway (REK 2019/554). Written informed consent was obtained from the caregivers of eligible children before enrolment in the study, that is, at 12 months of age. There were infants who could not be contacted at the end of infancy. For these children, the study team visited the house at the time of anthropometric assessments at 15 months of age and obtained written informed consent for neurodevelopment assessments at 24 months of age. The study is registered on Clinical Trials Registry-India (CTRI/2019/03/018238) (The authors report no conflicts of interest.