CXCL8 and neuromyelitis optica: IL-17A, IL-6, CXCL8 and CXCL10 levels were also higher in NMO/NMOSD patients than in RRMS patients (IL-17A: p = 0.024; IL-6: p = 0.012; CXCL8: p = 0.019; CXCL10: p = 0.019).