RT Journal Article SR Electronic T1 Natural history of obstructive coronary artery disease JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 293 OP 296 VO 45 IS 4 A1 Proudfit, William L. A1 Bruschke, Albert V. G. A1 Sones, F. Mason YR 1978 UL http://www.ccjm.org/content/45/4/293.abstract AB