1. Department of Internal Medicine I, Division of Endocrinology, Diabetes, and Metabolism, University Hospital Frankfurt, Frankfurt am Main, Germany.
2. Senckenberg Institute for Pathology, University Hospital Frankfurt, Frankfurt am Main, Germany.
3. Department of Nuclear Medicine, University Hospital Frankfurt, Frankfurt am Main, Germany.
4. Department of Surgery, Bürgerhospital Frankfurt, Frankfurt am Main, Germany.
5. Department of Surgery, University Hospital Frankfurt, Frankfurt am Main, Germany.