RT Journal Article SR Electronic T1 Clinical Medicine June 2007 JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 520 OP 520 DO 10.7861/clinmedicine.7-5-520 VO 7 IS 5 A2 Robert Allan YR 2007 UL http://www.rcpjournals.org/content/7/5/520.1.abstract AB