1. Department of Biomedical Photonics, University of Bern; Institute of Applied Physics; Sidlerstrasse 5 Bern 3012 Switzerland
2. Department of Cell Biology; University Medicine Rostock; Schillingallee 69 Rostock 18057 Germany
3. Department of Plastic and Reconstructive Surgery; University Hospital Bern; Bern 3010 Switzerland
4. Robert K. Schenk Laboratory of Oral Histology, School of Dental Medicine; University of Bern; Bern 3010 Switzerland
5. Vetsuisse Faculty, Division of Veterinary Anatomy; University of Bern; Länggass-Strasse 120 Bern 3012 Switzerland