PT - JOURNAL ARTICLE AU - Smitherman, Emily A. AU - Cron, Randy Q. TI - Hyperferritinemia Wins Again: Defining Macrophage Activation Syndrome in Pediatric Systemic Lupus Erythematosus AID - 10.3899/jrheum.210024 DP - 2021 Sep 01 TA - The Journal of Rheumatology PG - 1355--1357 VI - 48 IP - 9 4099 - http://www.jrheum.org/content/48/9/1355.short 4100 - http://www.jrheum.org/content/48/9/1355.full SO - J Rheumatol2021 Sep 01; 48