American Dental Association
http://www.ada.org
The Angle Orthodontist
http://www.angleorthodontist.org
The Pacific Coast Society of Orthodontists
http://www.pcsortho.org
University of Washington, Department of Orthodontics
http://www.dental.washington.edu/departments/ortho/
American Journal of Orthodontics & Dentofacial Orthopedics
http://www.mosby.com/ajodo
American Board of Orthodontics
http://www.americanboardortho.com/
American Dental Hygienists Association
http://www.adha.org/
Washington State Department of Health; Office of Radiation Protection
http://www.doh.wa.gov/ehp/rp/
American Academy Periodontology
http://www.perio.org
American Association of Oral and Maxillofacial Surgeons
http://www.aaoms.org/
American College of Prosthodontists
http://www.prosthodontics.org
American Medical Association
http://www.ama-assn.org