1. Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
2. Department of Oral Surgery, Dentistry School, Fluminense Federal University, Niterói, Rio De Janeiro, Brazil
3. Department of Oral Implantology, University of Wuhan, Wuhan, China
4. Department of Periodontology, University of Bern, Bern, Switzerland