Nora Klöting1, Michael Ristow2, Matthias Blüher1. 1. Helmholtz Institute for Metabolic, Obesity and Vascular Research, Helmholtz Zentrum München, University of Leipzig, Leipzig, Germany. 2. Energy Metabolism Laboratory, Institute of Translational Medicine, Department of Health Sciences and Technology, Swiss Federal Institute of Technology Zürich, Zürich, Switzerland.