RT Journal Article SR Electronic T1 Direct myocardial revascularization JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 51 OP 54 VO 41 IS 2 A1 Bennett, Donald J. A1 Loop, Floyd D. A1 Sheldon, William C. A1 Effler, Donald B. YR 1974 UL http://www.ccjm.org/content/41/2/51.abstract AB