1 Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, H3A 1A2, QC, Canada.
2 Department of Mathematics and Statistics, McGill University, Montreal, H3A 2K6, QC, Canada.
3 Centre for Paediatrics, Blizard Institute, Queen Mary University of London, London, E1 2AT, UK.
4 Zvitambo Institute for Maternal Child Health Research, Harare, Zimbabwe.
5 Program in International Nutrition, Division of Nutritional Sciences, Cornell University, Ithaca, NY, 14853, USA.
6 Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, 21205, USA.
7 Faculty of Medicine, School of Population and Public Health, University of British Columbia, 137-2206 East Mall, Vancouver, V6T 1Z3, BC, Canada. amee.manges@ubc.ca.