1. Department of Plastic, Reconstructive and Hand Surgery, Bern University Hospital, Inselspital, CH-3010 Bern, Switzerland.
2. Department of Clinical Research, University of Bern, CH-3010 Bern, Switzerland.
3. Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences Campus, Bangalore 560 065, India.
4. Division of Biomedical Engineering and Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Harvard-MIT Division of Heath Sciences and Technology, and Harvard Stem Cell Institute, Boston, MA 02139, USA.
5. Graduate School for Cellular and Biomedical Sciences, University of Bern, CH-3010 Bern, Switzerland.
6. Institute of Pathology, University of Bern, CH-3010 Bern, Switzerland.