1. Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital of Zürich (USZ) and University of Zürich (UZH) , 8091 Zurich , Switzerland
2. Institute of Clinical Chemistry and Laboratory Medicine, University Hospital and Medical Faculty Carl Gustav Carus, Technische Universität Dresden , 01307 Dresden , Germany
3. Institute of Anatomy, University of Zürich , 8057 Zurich , Switzerland
4. Division of Endocrinology, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School , Boston, MA 02115 , USA
5. Harvard Stem Cell Institute, Harvard University , Cambridge, MA 02138 , USA
6. Electrophysiology Facility, University of Zurich , 8057 Zürich , Switzerland
7. Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Ludwig-Maximilians-Universität , 81377 Munich , Germany
8. The LOOP Zurich Medical Research Center , 8044 Zurich , Switzerland