1. Department of Oral Surgery and Stomatology; School of Dental Medicine; University of Bern; Bern Switzerland
2. Department of Oral and Maxillofacial Surgery; Copenhagen University Hospital (Rigshospitalet); Copenhagen Denmark
3. Department of Oral and Maxillofacial Surgery and Oral Pathology; School of Dentistry, Health, Aarhus University; Aarhus Denmark
4. Department of Cranio-Maxillofacial Surgery; Bern University Hospital; Bern Switzerland
5. Robert K. Schenk Laboratory of Oral Histology; School of Dental Medicine; University of Bern; Bern Switzerland