RT Journal Article SR Electronic T1 The importance of verifying the diagnosis of acute venous thrombosis JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 553 OP 554 VO 52 IS 4 A1 D. E. Strandness, Jr. YR 1985 UL http://www.ccjm.org/content/52/4/553.abstract AB