RT Journal Article SR Electronic T1 Long-term treatment of relapsing-remitting multiple sclerosis with interferon β: how strongly should we encourage patients to adhere to the ‘old’ therapies? JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 1171 OP 1171 DO 10.1136/jnnp-2015-310763 VO 86 IS 11 A1 F Heidenreich YR 2015 UL http://jnnp.bmj.com/content/86/11/1171.abstract AB