1. From the Human Nutrition Laboratory, Institute of Food Science and Nutrition, ETH Zurich, Zurich, Switzerland (IA and MBZ); the Clinic for Endocrinology and Diabetes, University Hospital Zurich, Zurich, Switzerland (RL, GAS, and KB); the Children's Hospital of Eastern Switzerland, St Gallen, Switzerland (Dl'A); and the Child Development Center, University Children's Hospital, Zurich, Switzerland