1. NNF Center for Stem Cell Biology (DanStem), Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
2. Novo Nordisk A/S, Brennum Park 1, DK-3400, Hillerød, Denmark
3. NNF Center for Basic Metabolic Research, Section for Metabolic Receptology, Laboratory for Molecular Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
4. Institute of Stem Cell Research, Helmholtz Zentrum München, 85764 Neuherberg, Germany