RT Journal Article SR Electronic T1 The importance of subchondral bone in the progression of osteoarthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 77 OP 80 VO 70 A1 David B Burr YR 2004 UL http://www.jrheum.org/content/70/77.abstract AB