RT Journal Article SR Electronic T1 Interobserver variability in interpretation of coronary arteriograms JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 137 OP 139 VO 47 IS 3 A1 Kemp, Harvey G. YR 1980 UL http://www.ccjm.org/content/47/3/137.abstract AB