1. Department of Medicine I and Clinical Chemistry, Heidelberg University Hospital, Heidelberg, Germany
2. German Cancer Research Center (DKFZ), Heidelberg, Germany
3. German Center for Diabetes Research (DZD), München-Neuherberg, Germany
4. Joint Heidelberg-IDC Translational Diabetes Program, Dept. Inner Medicine I, Heidelberg University Hospital, Germany
5. Institute for Diabetes and Cancer IDC, Helmholtz Center Munich, Germany