IL6 and post-traumatic stress disorder: PCS severity correlate with plasma TNF-α (r = −0.2328, p = 0.02).PTSD correlated weakly with plasma TNF-α (r = −0.2267, p = 0.0255). A marginally sig. correlation between PTSD and exosomal IL-6 (r = 0.1893, p = 0.08).