General Orthopaedics
Providence Saint Joseph Hospital
American Academy of Orthopaedic Surgeons  
Wheeles Textbook of Orthopaedics

 
Sports Medicine
American Orthopaedic Society for Sports Medicine

 
Shoulder, Elbow, & Hand
American Shoulder and Elbow Surgeons  
American Society for Surgery of the Hand 
Electronic Textbook of Hand Surgery

 
Hip & Knee
American Association of Hip and Knee Surgeons 
The Hip Society  
The Knee Society

 
Foot & Ankle
American Orthopaedic Foot and Ankle Society

 
Spine
North American Spine Society

 
General Health
Foundation for Osteoporosis Research and Education  
American Diabetic Association  
Arthritis Foundation  
National Center for Complimentary and Alternative Medicine  
Emedicine  
Medline Plus 
WebMD