1. JRG Adipocytes and Metabolism, Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Center Munich, 85748 Garching, Germany
2. German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
3. Division of Metabolic Diseases, Department of Medicine, Technische Universität München, 80333 Munich, Germany