Rheumatoid arthritis: ankylosing spondylitis, associated syndromes, the disease in children.
D001171:Arthritis, Juvenile / Q000150:complications*; D002648:Child; D004502:Education, Medical, Continuing; D006801:Humans; D011380:Programmed Instructions as Topic; D013167:Spondylitis, Ankylosing / Q000150:complications*