RT Journal Article SR Electronic T1 Gross Intravenous Extension of Carcinoma of the Lung JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 187 OP 190 VO 25 IS 3 A1 McCormack, Lawrence J. A1 Hoffmann, George L. A1 Groves, Laurence K. A1 Effler, Donald B. YR 1958 UL http://www.ccjm.org/content/25/3/187.abstract AB