1. Laboratory of Human Nutrition Institute of Food, Nutrition and Health ETH Zürich Zurich Switzerland
2. MRC Unit The Gambia at London School of Hygiene & Tropical Medicine Banjul The Gambia
3. Department of Pediatrics College of Physicians and Surgeons Columbia University New York USA
4. Department of Laboratory Medicine Cantonal Hospital Luzern Luzern Switzerland
5. Nutrition Group Health Department Swiss Distance University of Applied Sciences Regensdorf Switzerland