1. From the Medizinische Klinik und Poliklinik IV, Klinikum der Universität München (L.S.M., X.W., E.S., F.B., M.R., T.A.W.)
2. Division of Internal Medicine and Hypertension, Department of Medical Sciences, University of Turin, Italy (J.B., P.M., T.A.W.)
3. Department of Electronics and Telecommunications, Polytechnic University of Turin, Italy (A.B.)
4. Division of Pathology, Department of Medical Sciences, University of Torino, Italy (I.C.)
5. Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany (G.E., M.P.)
6. Department of Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany (G.E., J.W.M.L.)
7. Department of Medicine DIMED, University of Padova, Italy (F.F.)
8. Department of Medicine, University of Calgary, Alberta, Canada (G.A.K.)
9. Institute of Pathology (T. Knösel), Ludwig-Maximilians-University of Munich, Germany
10. Department of Endocrinology, Diabetes, and Metabolic Diseases, University Medical Centre, Ljubljana, Slovenia (T. Kocjan)
11. Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands (J.W.M.L.)
12. Department of Endocrinology, Metabolism, and Hypertension, Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Japan (M.N.)
13. Endocrinology and Diabetes Center, Yokohama Rosai Hospital, Japan (T.N.)
14. Department of Nephrology, Heinrich-Heine-University, Düsseldorf, Germany (L.C.R.)
15. Klinik für Endokrinologie, Diabetologie und Klinische Ernährung, Universitätsspital Zürich, Switzerland (F.B.)
16. Department of Internal Medicine I, Endocrinology and Diabetes Unit, University Hospital of Würzburg, Germany (S.H.)
17. Division of Endocrinology, Department of Medicine, University of Mississippi Medical Center, Jackson, MS (C.E.G.-S.)
18. Research and Medicine Services, G.V. (Sonny) Montgomery VA Medical Center, Jackson, MS (C.E.G.-S.).