RT Journal Article SR Electronic T1 Unstable angina —experience with surgical therapy in the subset of patients having preinfarction angina JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 184 OP 188 VO 45 IS 1 A1 Matloff, Jack M. A1 Chaux, Aurelio A1 Sustaita, Hector YR 1978 UL http://www.ccjm.org/content/45/1/184.abstract AB