IFNB1 and relapsing-remitting multiple sclerosis: Almost all patients had relapsing remitting MS (RRMS), 55 of 102 with a stable, symptom-free disease under medication with first or second line disease modifying drugs including beta-interferon, fingolimod, natalizumab, fumaric acid or glatiramer acetate, 22 with acute relapse, 6 of them with high-dose prednisolone, and 20 presented with the first course of the disease.