Steno Diabetes Center Copenhagen, Gentofte, Denmark. University Clinic of Endocrinology, Diabetes and Metabolic Disorders, Skopje, Macedonia. Division of Nephrology, Department of Internal Medicine, University Medical Center Groningen, University of Groningen, Groningen, Netherlands. Division of Nephrology and KfH Renal Unit, Hospital St Georg, Leipzig, Germany; Martin-Luther University Halle, Wittenberg, Germany. Amsterdam Public Health Research Institute, VU University Medical Center, Amsterdam, Netherlands; Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, Netherlands. Department of Internal Medicine IV, Division of Endocrinology, Diabetology, and Nephrology, University Hospital Tübingen, Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich at Eberhard Karls University of Tübingen, Tübingen, Germany; German Center for Diabetes Research, Neuherberg, Germany. Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK. Diabetespraxis, Leipzig, Germany. 1st Department, Charles University, Third Faculty of Medicine, Prague, Czech Republic. Diabetes Center, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. Diabetologische Schwerpunktpraxis, Diabetologen Hessen, Marburg, Germany. Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands. Bethesda Diabetes Research Center, Hoogeveen, Netherlands; Diabetes Vascular Research Foundation (DVRF), Hoogeveen, Netherlands; University Medical Center Groningen, Groningen, Netherlands. Department of Internal Medicine/Nephrology, Ziekenhuisgroep Twente Hospital, Almelo, Netherlands. Mosaiques Diagnostics, Hannover, Germany. Department General Practice and Elderly Care, Amsterdam, Netherlands. Diabetes Center, 2nd Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, Hippokratio General Hospital, Athens, Greece. Instituto de Investigacion Sanitaria de la Fundacion Jiménez Díaz UAM, Madrid, Spain. Department of Renal Medicine, Clinical Research Centre for Rare Diseases "Aldo e CeleDaccò": Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Ranica, Bergamo, Italy. Amsterdam Public Health Research Institute, VU University Medical Center, Amsterdam, Netherlands. 1st Department, Charles University, Third Faculty of Medicine, Prague, Czech Republic; Faculty Hospital Královské Vinohrady, Prague, Czech Republic. Department of Nephrology, Cyril and Methodius University in Skopje, Skopje, North Macedonia. Department of Nephrology, Ghent University Hospital, Ghent, Belgium. Hannover Clinical Trial Center, Hannover Medical School, Hannover, Germany. Steno Diabetes Center Copenhagen, Gentofte, Denmark; University of Copenhagen, Copenhagen, Denmark. Electronic address: peter.rossing@regionh.dk.