Department of Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. Division of Endocrinology and Diabetes, Department of Internal Medicine I, University Hospital of Würzburg, Würzburg, Germany. Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. First Department of Medicine, University Medical Center Schleswig-Holstein, Lübeck, Germany. Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands. Medizinische Klinik und Poliklinik IV, Klinikum der Ludwig-Maximilians-Universität München, Munich, Germany. Department of Endocrinology, Diabetology and Clinical Nutrition, UniviersitätsSpital Zürich, Zürich, Switzerland. Department of Computing and Information, University of Melbourne, Melbourne, Australia. Department of Hypertension, Institute of Cardiology, Warsaw, Poland.