RT Journal Article SR Electronic T1 A practical approach to the diagnosis of venothromboembolism JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 274 OP 281 DO 10.7861/clinmedicine.1-4-274 VO 1 IS 4 A1 Paul A Corris YR 2001 UL http://www.rcpjournals.org/content/1/4/274.abstract AB