Physical activity, cystic erosions, and osteoporosis in rheumatoid arthritis.
D000328:Adult; D001172:Arthritis, Rheumatoid / Q000150:complications*; D003560:Cysts / Q000209:etiology*; D005260:Female; D006227:Hand Deformities, Acquired / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000209:etiology*; D005082:Physical Exertion; D011859:Radiography; D013223:Statistics as Topic