1. Human Nutrition Laboratory, Institute of Food, Nutrition, and Health, ETH Zurich, Zurich, Switzerland
2. International Council for the Control of Iodine Deficiency Disorders, Zurich, Switzerland
3. Clinic for Endocrinology, Diabetes and Clinical Nutrition, University Hospital Zurich, Zurich, Switzerland
4. Human Nutrition Division, Wageningen University, Wageningen, The Netherlands