Multifactorial index of cardiac risk in noncardiac surgical procedures. - Goldman,L.; Caldera,D.L.; Nussbaum,S.R.; Southwick,F.S.; Krogstad,D.; Murray,B.; Burke,D.S.; O'Malley,T.A.; Goroll,A.H.; Caplan,C.H.; Nolan,J.; Carabello,B.; et al. (N Engl J Med, 1977)