RT Journal Article SR Electronic T1 Punding in Parkinson’s disease JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 397 OP 399 DO 10.1136/jnnp.2007.129015 VO 7 IS 6 A1 Sean S O’Sullivan A1 Andrew H Evans A1 Andrew J Lees YR 2007 UL http://pn.bmj.com/content/7/6/397.abstract AB