RT Journal Article SR Electronic T1 Clinical Medicine Journal of the Royal College of Physicians of London JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 519 OP 521 DO 10.7861/clinmedicine.1-6-519 VO 1 IS 6 YR 2001 UL http://www.rcpjournals.org/content/1/6/519.abstract AB