Global sensitivity analysis reveals that TNFα is highly sensitive to TGFβ and IL-10. Total sensitivity indices (ST) were computed for each parameter and data are shown for all parameters with ST > 0.2. The temporal profile of the LPS-induced TNFα response, for saturating stimulus (LPS = 1000), is shown above the sensitivity index heatmap. Sensitivity indices were computed at times corresponding to the simulated waveform. All identified parameters involve one of the following cytokines: IL-1β, TGFβ, IL-10, or IL-6.