RT Journal Article SR Electronic T1 Osteoarthritis, Exercise, and Knee Replacement JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 669 OP 671 DO 10.3899/jrheum.111087 VO 39 IS 4 A1 FRIES, JAMES F. A1 BRUCE, BONNIE A1 SHOOR, STANFORD YR 2012 UL http://www.jrheum.org/content/39/4/669.abstract AB