RT Journal Article SR Electronic T1 WOMAC: a 20-year experiential review of a patient-centered self-reported health status questionnaire. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2473 OP 2476 VO 29 IS 12 A1 Nicholas Bellamy YR 2002 UL http://www.jrheum.org/content/29/12/2473.abstract AB