Physical Therapy & Preventive Medicine:
http://www.fitness-Forum.com

Stryker Orthopaedics:
http://www.stryker.com/jointreplacements/patient

American Academy of Orthopaedic Surgeons:
http://www.aaos.org

About.com:
http://orthopedics.about.com

Arthritis foundation:
http://www.arthritis.org

NY Pain Center:
http://www.newyorkpaincenter.medem.com

Sarah House:
http://www.sarahhouse.org

Birmingham HIP Resurfacing System
http://www.birminghamhipresurfacing.com

Zimmer Joint Replacement Solutions
http://www.zimmer.com

Depuy Orthopedics
http://www.depuy.com

Biomet Orthopedics
http://www.biomet.com

Stelkast Orthopedics
http://www.stelkast.com