RT Journal Article SR Electronic T1 Direct myocardial revascularization — 1976 JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 97 OP 108 VO 43 IS 3 A1 William C. Sheldon A1 Floyd D. Loop YR 1976 UL http://www.ccjm.org/content/43/3/97.abstract AB