1. Department of Medicine (M.A.N., A.M.F., W.S.), Ruhr-University, Knappschafts-Krankenhaus, D-44892 Bochum, Germany
2. Diabeteszentrum Bad Lauterberg (M.A.N.), D-37431 Bad Lauterberg im Harz, Germany
3. Division of Neuroendocrinology (M.R., G.B., J.Z.), Institute of Anatomy, University of Zurich, Switzerland
4. Institute of Pathology (A.P.), University Hospital, CH-8057 Zürich, Switzerland
5. Medical Research Laboratories (J.F., A.F.), Institute of Experimental Clinical Research, Aarhus University Hospital, DK-8000 Aarhus, Denmark
6. Department of Internal Medicine (C.Z., J.Z.), University Hospital, Zurich, Switzerland
7. Department of Internal Medicine (P.G.L.), Städtische Kliniken D-21339 Lüneburg, Germany
8. Department of Pediatrics (W.F.B.), University of Giessen, Giessen, and Eli Lilly & Co., D-61350 Bad Homburg, Germany
9. Department of Pathology (G.K.), Christian-Albrecht-University, D-24105 Kiel, Germany