TNF and Sepsis: Of the 401 patients enrolled and reported in the Phenotyping Pediatric Sepsis-induced Multiple Organ Failure study (PHENOMS), 397 had ferritin levels, 32 cytokines, whole blood ex vivo TNF response to endotoxin, and ADAMTS13 activity assayed for this analysis (CONSORT diagram, Additional file 1: eFigure 1).