GFAP and premenstrual tension: No correlations were found between EDSS and GFAP (R = 0.08, p = 0.466) and NFH in the RRMS group (R = 0.08, p = 0.366) or in the PMS group (R = 0.36, p = 0.34; R = 0.26, p = 0.13, respectively).