RT Journal Article SR Electronic T1 An appreciation JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 541 OP 541 DO 10.7861/clinmedicine.7-6-541a VO 7 IS 6 A1 Robert Allan YR 2007 UL http://www.rcpjournals.org/content/7/6/541.2.abstract AB