1. American Academy of Orthopedic Surgeons: www.aaos.org.
2. American Board of Independent Medical Examiners: www.abime.org.
3. American College of Occupational and Environmental Medicine: www.acoem.org.
4. First consulting group: when I’m 64: how boomers will change health care,2007
5. American Medical Association: www.ama-assn.org.