IFNG and neuromyelitis optica: Rho correlation coefficients of cytokines/chemokines between RRMS and NMO/NMOSD in the relapse phase were significantly different in three combinations (IL-6 and GM-CSF: corrp = 0.034; G-CSF and GM-CSF: corrp = 0.034; GM-CSF and IFN-γ: corrp = 0.034).