Arthritis Foundation
Center for Disease Control and Prevention
Cleveland Clinic
Lupus Foundation of America
Mayo Clinic
National Fibromyalgia Foundation
National Institute of Arthritis and Musculoskeletal and Skin Diseases
National Library of Health and the National Institutes of Health
National Osteoporosis Foundation
National Psoriasis Foundation
Scleroderma Foundation
Sjogren’s Syndrome Foundation
Spondylitis Association of America
Web MD