RT Journal Article SR Electronic T1 Geriatrics JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 166 OP 168 DO 10.7861/clinmedicine.11-2-166 VO 11 IS 2 A1 John Grimley Evans YR 2011 UL http://www.rcpjournals.org/content/11/2/166.abstract