PT - JOURNAL ARTICLE AU - XIULU RUAN AU - ALAN DAVID KAYE TI - Defining Chronic Pain AID - 10.3899/jrheum.150807 DP - 2016 Apr 01 TA - The Journal of Rheumatology PG - 826--827 VI - 43 IP - 4 4099 - http://www.jrheum.org/content/43/4/826.1.short 4100 - http://www.jrheum.org/content/43/4/826.1.full SO - J Rheumatol2016 Apr 01; 43