1. Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
2. Department of Oral and Maxillofacial Surgery, Tokyo Medical University, Tokyo, Japan
3. Advanced Research Center, School of Life Dentistry at Niigata, The Nippon Dental University, Niigata, Japan
4. Department of Oral Implantology, University of Wuhan, Wuhan, China
5. Department of Periodontology, University of Bern, Bern, Switzerland