1. Department of Molecular Oncology, Göttingen Center for Molecular Biosciences, University Medical Center Göttingen, Göttingen, Germany
2. Department of Tumor Biology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
3. Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Göttingen, Germany
4. Institute of Stem Cell Research, Helmholtz Centre Munich, Munich, Germany