1. Department of General, Visceral, Transplant, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany
2. Chair for Tissue Engineering and Regenerative Medicine, Wuerzburg, Germany
3. Institute of Anatomy and Cell Biology, Ludwig-Maximilians-University, Munich, Germany
4. Institute of Pathology, Wuerzburg, Germany
5. Fraunhofer Institute for Silicate Research ISC, Translational Centre for Regenerative Therapies TLC-RT, Wuerzburg, Germany