PT - JOURNAL ARTICLE AU - NICO M. WULFFRAAT TI - Defining Criteria for Macrophage Activation Syndrome, a Process Towards Early Recognition and Treatment AID - 10.3899/jrheum.101269 DP - 2011 Apr 01 TA - The Journal of Rheumatology PG - 593--594 VI - 38 IP - 4 4099 - http://www.jrheum.org/content/38/4/593.short 4100 - http://www.jrheum.org/content/38/4/593.full SO - J Rheumatol2011 Apr 01; 38