RT Journal Article SR Electronic T1 Can the early presence of autonomic dysfunction aid diagnosis in parkinsonism? JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 566 OP 566 DO 10.1136/jnnp.67.5.566 VO 67 IS 5 A1 MATHIAS, CHRISTOPHER J YR 1999 UL http://jnnp.bmj.com/content/67/5/566.abstract AB