Acute Physiology and Chronic Health Evaluation (APACHE II) score and outcome in the surgical intensive care unit: an analysis of multiple intervention and outcome variables in 1,238 patients. - Rutledge,R.; Fakhry,S.M.; Rutherford,E.J.; Muakkassa,F.; Baker,C.C.; Koruda,M.; Meyer,A.A. (Crit Care Med, 1991)