RT Journal Article SR Electronic T1 Motor Neurone Disease JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 191 OP 191 DO 10.1136/jnnp.41.2.191 VO 41 IS 2 A1 J. P. Ballantyne YR 1978 UL http://jnnp.bmj.com/content/41/2/191.1.abstract AB