RT Journal Article SR Electronic T1 Neurological letter from Calcutta JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP practneurol-2017-001700 DO 10.1136/practneurol-2017-001700 A1 Tapas Kumar Banerjee YR 2017 UL http://pn.bmj.com/content/early/2017/08/28/practneurol-2017-001700.abstract AB