1 Institute for Clinical Diabetology and Leibniz Center for Diabetes Research at Heinrich-Heine University Düsseldorf, German Diabetes Center, Düsseldorf, Germany German Center for Diabetes Research (DZD e.V.), München-Neuherberg, Germany.
2 Institute for Clinical Diabetology and Leibniz Center for Diabetes Research at Heinrich-Heine University Düsseldorf, German Diabetes Center, Düsseldorf, Germany German Center for Diabetes Research (DZD e.V.), München-Neuherberg, Germany Department of Endocrinology and Diabetology, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany [email protected].