RT Journal Article SR Electronic T1 Superiority of the internal mammary artery as a coronary bypass graft JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 81 OP 82 VO 45 IS 1 A1 Ochsner, John L. YR 1978 UL http://www.ccjm.org/content/45/1/81.abstract AB