RT Journal Article SR Electronic T1 The neurology of old age JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 54 OP 56 DO 10.7861/clinmedicine.11-1-54 VO 11 IS 1 A1 Biba R Stanton YR 2011 UL http://www.rcpjournals.org/content/11/1/54.abstract