RT Journal Article SR Electronic T1 Predicting PML in natalizumab-treated patients: can we do better? JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 1182 OP 1183 DO 10.1136/jnnp-2012-304777 VO 84 IS 11 A1 Derfuss, Tobias A1 Kappos, Ludwig YR 2013 UL http://jnnp.bmj.com/content/84/11/1182.abstract AB