RT Journal Article SR Electronic T1 Exercise and Parkinson's disease JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 1185 OP 1185 DO 10.1136/jnnp-2011-300987 VO 82 IS 11 A1 E Diane Playford YR 2011 UL http://jnnp.bmj.com/content/82/11/1185.abstract AB