1. Endocrine Research Unit, Medizinische Klinik-Innenstadt, Ludwig-Maximilians University, Munich;
2. First Department of Medicine, Molecular Hepatology Laboratory, Martin-Luther University Halle-Wittenberg, Halle, Germany; and
3. Obesity Research Center, Metabolic Diseases Institute, College of Medicine, University of Cincinnati, Cincinnati, Ohio;
4. Department of Nutrition and Dietetics, Ludwig-Maximilians University, Munich, Germany