protein (mg/L) 0.0–5.0 137 77.7 138 121 Procalcitonin (mcg/L) 0.00–0.25 1.37 2.09 1.67 2.07 IL (interleukin)-6 (ng/L) < 3.4 491 32.7 NA NA Ferritin (mcg/L) 30–400 605 378 NA NA D-Dimer (m