1 Division of Endocrinology and Diabetology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany.
2 Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany.
3 German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.
4 German Institute of Human Nutrition, Department of Experimental Diabetology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany.
5 Laikon University Hospital, Athens, Greece.
6 Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
7 Institute for Clinical Biochemistry and Pathobiochemistry, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany.
8 Institute for Biometrics and Epidemiology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany.
9 General Surgery Department, Schön Clinics, Düsseldorf, Germany.
10 Institute of Nutritional Sciences, University of Potsdam, Nuthetal, Germany.
11 Division of Endocrinology and Diabetology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany. [email protected].
12 Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany. [email protected].
13 German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany. [email protected].