1 Institute for Diabetes Research and Metabolic Diseases, Helmholtz Diabetes Center, Helmholtz Munich, Munich, Germany. andreas.birkenfeld@med.uni-tuebingen.de.
2 German Center for Diabetes Research (DZD), Neuherberg, Germany. andreas.birkenfeld@med.uni-tuebingen.de.
3 Internal Medicine IV, Department of Diabetology, Endocrinology and Nephrology, University of Tübingen, Tübingen, Germany. andreas.birkenfeld@med.uni-tuebingen.de.
4 Diabetes and Obesity Theme, School of Cardiovascular and Metabolic Medicine and Sciences, Faculty of Life Sciences and Medicine, Kings College London, London, UK. andreas.birkenfeld@med.uni-tuebingen.de.
5 Division of Chronic Inflammation and Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany.
6 Cluster of Excellence iFIT (EXC 2180) 'Image-Guided and Functionally Instructed Tumor Therapies', University of Tübingen, Tübingen, Germany.
7 M3-Research Center for Malignome, Metabolome and Microbiome, Institute for Interdisciplinary Research on Cancer Metabolism and Chronic Inflammation, Faculty of Medicine, University of Tübingen, Tübingen, Germany.
8 Cluster of Excellence EXC 2124 Controlling Microbes to Fight Infections, University of Tübingen, Tübingen, Germany.