1. Department of Surgery, College of Medicine University of Illinois at Chicago Chicago IL USA
2. Department of Hospital Dentistry Naval Medical Center San Diego CA USA
3. Maxillofacial Prosthodontics Surgical Dentistry King Fahad Medical City Riyadh Saudi Arabia
4. Private practice Inwood West Virginia USA
5. Division of Comprehensive Oral Health, Adams School of Dentistry The University of North Carolina Chapel Hill NC USA
6. Department of Head and Neck Surgery, Division of Surgery The University of Texas M.D. Anderson Cancer Center Houston TX USA