1. Department of Oral Surgery and Implantology; Catholic University of the Sacred Heart; Rome Italy
2. Department of Surgery; Geneva University Hospitals, University of Geneva, Unit of Oral Surgery and Implantology, Service of Maxillofacial and Buccal Surgery; Geneva Switzerland
3. Department of Periodontics and Endodontics; State University of New York at Buffalo; Buffalo NY
4. Department of Restorative Dentistry; State University of New York at Buffalo; Buffalo NY