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• Ankylosing Spondylitis from the Spondylitis Association of America
• Arthritis FAQ written by the editors of FAQNET, a publisher of online consumer guides.
• Arthritis Foundation
• Arthritis Disease Center alphabetical list of information about over 100 forms of arthritis
• Arthritis Disease Center Types of Juvenile Arthritis
• Arthritis Society of Canada
• Foreningen af Unge med Gigt (FNUG) [Danish Organisation of Youth with Rheumatism]
• Gigforeningen [Danish Arthritis Society]
• International League of Associations for Rheumatology (ILAR)
• International Organisation of Youth with Rheumatism (IOYR)
• Italian Society for Rheumatology [Italy]
• National Ankylosing Spondylitis Society (NASS) [United Kingdom]