RT Journal Article SR Electronic T1 Harveian Oration 2008 JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 196 OP 196 DO 10.7861/clinmedicine.9-2-196 VO 9 IS 2 A1 GH HALL YR 2009 UL http://www.rcpjournals.org/content/9/2/196.1.abstract