1. Department of Otolaryngology—Head and Neck Surgery Henry Ford Health System Detroit Michigan U.S.A.
2. Tataryn Endodontics Spokane Washington U.S.A.
3. Department of Endodontics, School of Dentistry Loma Linda University Loma Linda California U.S.A.
4. Wayne State School of Medicine Detroit Michigan U.S.A.
5. Department of Oral Maxillofacial Surgery Henry Ford Health System Detroit Michigan U.S.A.
6. Department of Anesthesiology Henry Ford Health System Detroit Michigan U.S.A.
7. Henry Ford Health System, Department of Neurosurgery Center for Health Policy and Health Services Research Detroit Michigan U.S.A.
8. Syracuse Otolaryngology Syracuse New York U.S.A.