HOSPITAL

- The Cleveland Clinic

- Mayo Clinic - Arthritis

INSTITUTE

- National Institute of Arthritis and Musculoskeletal and Skin Diseases

- National Center for complementary and alternative medicine - Rheumatoid Arthritis

- National Institutes of Health - Osteoarthritis

- The Arthritis Research Institute of America

JOURNAL

- Highwire Press

- Science

- Nature

- Journal of Clinical Investigations

- Annals of Rheumatic Diseases

- Journal Bone Mineral Research

- Calcified Tissue International

- The Journal of Bone & Joint Surgery

LIBRARY

- NCBI y la National library of Medicine (NLM)

PORTAL

- Osteoarthritis Health Channel

- Arthritis and Rheumatism

- About - Arthritis

- Medline Plus - Arthritis

- MedicineNet - OsteoArthritis

- Arthritis Foundation

SOCIETY

- The Arthritis Society

- IBMS

- American Society for Bone and Mineral Research

- International Bone and Mineral Society.

- American College of Rheumatology

UNIVERSITY

- Oregon Health and Science University