1. Department of Cranio-Maxillofacial Surgery; Inselspital; University of Bern; Bern Switzerland
2. Laboratory of Oral Cell Biology; School of Dental Medicine; University of Bern; Bern Switzerland
3. College of Stomatology; GuangXi Medical University; GuangXi China
4. Department of Oral Surgery and Stomatology; School of Dental Medicine; University of Bern; Bern Switzerland
5. Robert K. Schenk Laboratory of Oral Histology; School of Dental Medicine; University of Bern; Bern Switzerland