RT Journal Article SR Electronic T1 Clarifications JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP e1 OP e1 DO 10.1136/practneurol-2014-000809 VO 15 IS 1 YR 2015 UL http://pn.bmj.com/content/15/1/e1.2.abstract AB