RT Journal Article SR Electronic T1 Toward Standardized Ultrasound Measurements of Cartilage Thickness in Children JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2445 OP 2447 DO 10.3899/jrheum.100958 VO 37 IS 12 A1 MAGGIE J. LARCHÉ A1 JOHANNES ROTH YR 2010 UL http://www.jrheum.org/content/37/12/2445.abstract AB