RT Journal Article SR Electronic T1 Drs. Dai and Felson reply JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 303 OP 303 DO 10.3899/jrheum.201222 VO 48 IS 2 A1 Zhaoli Dai A1 David T. Felson YR 2021 UL http://www.jrheum.org/content/48/2/303.2.abstract AB