1. Department of Prosthodontics Tufts University School of Dental Medicine Boston Massachusetts USA
2. Department of Prosthodontics University of Rochester Eastman Institute for Oral Health Rochester New York USA
3. Department of Prosthodontics University of Washington Seattle Washington USA
4. Department of Dental Public Health King Abdulaziz University Faculty of Dentistry Jeddah Saudi Arabia
5. Center for Implant Dentistry University of Florida Gainsville Florida USA