1. Department of Preventive; Restorative and Pediatric Dentistry; School of Dental Medicine; University of Bern; Bern Switzerland
2. Department of Conservative Dentistry & Periodontology; Medical University of Vienna; Vienna Austria
3. Department of Cranio-Maxillofacial Surgery; University of Bern; Bern Switzerland
4. Laboratory of Oral Cell Biology; School of Dental Medicine; University of Bern; Bern Switzerland
5. Department of Oral Biology; Medical University of Vienna; Vienna Austria