The "SWiss Atorvastatin and Interferon-Beta 1b Trial In Multiple Sclerosis - Follow up Study" is the follow up study of the "SWiss Atorvastatin and Interferon Beta-1b Trial In Multiple Sclerosis (SWABIMS)" (see http://www.clinicaltrials.gov. Identifier: NCT00942591) SWABIMS evaluated the efficacy, safety and tolerability of atorvastatin 40 mg in addition to interferon-beta 1b compared to interferon-beta 1b monotherapy in patients with relapsing-remitting multiple sclerosis for 15 month. The SWABIMS Follow up study observes patients that finish the SWABIMS study for another 12 month with ongoing unchanged medication.