RT Journal Article SR Electronic T1 Stress testing in the evaluation of patients suspected of having coronary heart disease JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 11 OP 12 VO 45 IS 1 A1 Ellestad, Myrvin H. YR 1978 UL http://www.ccjm.org/content/45/1/11.abstract AB