PT - JOURNAL ARTICLE AU - JAMES F. FRIES AU - ESWAR KRISHNAN AU - BONNIE BRUCE TI - Items, Instruments, Crosswalks, and PROMIS AID - 10.3899/jrheum.090320 DP - 2009 Jun 01 TA - The Journal of Rheumatology PG - 1093--1095 VI - 36 IP - 6 4099 - http://www.jrheum.org/content/36/6/1093.short 4100 - http://www.jrheum.org/content/36/6/1093.full SO - J Rheumatol2009 Jun 01; 36