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3. Preand postoperative exercise testing in patients undergoing direct myocardial revascularization (abstract);Bergman, S.A.; Urschel, H.C.; Blomqvist, G.;Circulation,1971
4. Coronary bypass surgery for unstable angina pectoris;Berndt, T.B.; Miller, D.C.; Silverman, J.F.; Stinson, E.B.; Harrison, D.C.; Schroeder, J.S.;American Journal of Medicine,1975
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