TNF and Guillain-Barre syndrome: Furthermore, the CSF levels of IL-36α and IL-36γ in GBS were positively correlated with the CSF levels of IL-17 and TNF-α (r = 0.395, P = .01, Fig. 5b; r = 0.470, P < .01, Fig. 5c; r = 0.520, P < .01, Fig. 5h; r = 0.562, P < .01, Fig. 5i, respectively).