RT Journal Article SR Electronic T1 Parkinson's disease JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 628 OP 628 DO 10.7861/clinmedicine.9-6-628 VO 9 IS 6 A1 Adrian Williams YR 2009 UL http://www.rcpjournals.org/content/9/6/628.abstract