RT Journal Article SR Electronic T1 Neurology and the gastrointestinal system JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 291 OP 300 DO 10.1136/jnnp.65.3.291 VO 65 IS 3 A1 G D Perkin A1 I Murray-Lyon YR 1998 UL http://jnnp.bmj.com/content/65/3/291.abstract AB