1. Paul Langerhans Institute Dresden, Helmholtz Center Munich, University Clinic Carl Gustav Carus, Technische Universität Dresden, Helmholtz Zentrum München, Neuherberg, Germany
2. German Research Foundation–Center for Regenerative Therapies Dresden (CRTD), Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
3. German Center for Diabetes Research (DZD), München-Neuherberg, Germany
4. Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany