1 German Centre for Diabetes Research (DZD), Germany.
2 Heisenberg Professorship and Chair of Clinical Experimental Diabetology, Department of Internal Medicine IV, Endocrinology, Diabetology, and Nephrology, University Hospital, Tübingen, Germany.
3 Department of Pathophysiology of Prediabetes of the Institute for Diabetes Research and Metabolic Diseases (IDM) of Helmholtz Centre Munich at the University of Tübingen, Germany.
4 Division for Endocrinology and Diabetology, Medical Faculty of the Heinrich Heine University and University Hospital, Düsseldorf, Germany.
5 Institute for Clinical Diabetology, German Diabetes Centre (DDZ), Leibniz Centre for Diabetes Research at the Heinrich Heine University, Düsseldorf, Germany.