Validity, reliability, and applicability of seven definitions of hip osteoarthritis used in epidemiological studies: a systematic appraisal
M Reijman, J M W Hazes, B W Koes, A P Verhagen, S M A Bierma-Zeinstra
Annals of the Rheumatic Diseases Mar 2004, 63 (3) 226-232; DOI: 10.1136/ard.2003.010348
