1. Bandim Health Project, INDEPTH Network, Bissau, Guinea-Bissau
2. Research Center for Vitamins and Vaccines (CVIVA), Bandim Health Project, Statens Serum Institut, Copenhagen, Denmark
3. OPEN, Odense Patient Data Explorative Network, Odense University Hospital/Institute of Clinical Research, University of Southern Denmark
4. London School of Hygiene and Tropical Medicine, United Kingdom