CXCL8 and premenstrual tension: EDSS correlated positively with IL-8 and IL-19 in the whole MS cohort (R = 0.18, p = 0.008; R = 0.24, p < 0.001, respectively) and in RRMS patients (R = 0.21, p = 0.019; R = 0.19, p = 0.031, respectively), while it correlated positively only with IL-19 in the PMS group (R = 0.7, p < 0.001).