1. Creighton University School of Dentistry, Department of Periodontology, Omaha, NE, USA
2. Boston University Henry M. Goldman School of Dental Medicine, Department of Health Policy and Health Services Research, Boston, MA, USA
3. Private practice, Hartsdale, NY, USA
4. VA Boston Healthcare System, Boston, MA, USA
5. Boston University Henry M. Goldman School of Dental Medicine, Department of Oral and Maxillofacial Surgery, Boston, MA, USA
6. Private practice, Orlando, FL, USA
7. Boston University Henry M. Goldman School of Dental Medicine, Department of Oral and Maxillofacial Radiology, Boston, MA, USA
8. Nihon University School of Dentistry at Matsudo, Department of Removable Prosthodontics, Chiba, Japan
9. Seoul National University Bundang Hospital, Department of Periodontology, Seongnam-si, Korea
10. Creighton University School of Dentistry, Department of Oral and Maxillofacial Surgery, Omaha, NE, USA