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Supertopics:
Bones

Knees

Subtopics and Documents:
webDai Z, Lu N, Niu J, Felson DTArthritis Care Res2017-08-13
webMarilynn MarchioneAssociated Press2011-05-22
webMargaret TalbotNew York Times2000-01-09
webJonathan KnightNew Scientist1998-01-24