1. Department of Human Nutrition, Institute of Nutrition, University of Jena, Jena D-07743, Germany
2. Energy Metabolism Laboratory, Swiss Federal Institute of Technology (ETH) Zurich, Schwerzenbach/Zürich, CH-8603, Switzerland
3. Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal D-14558, Germany