title: Invited commentary.
authors.affiliation: Department of Cardiothoracic Anesthesia (G-3), The Cleveland Clinic Foundation, 9500 Euclid Ave, Cleveland, OH 44195, USA. kochc@ccf.org
authors.forename: Colleen Gorman
authors.initials: CG
authors.lastname: Koch
mesh_terms: D001803:Blood Transfusion / Q000379:methods / Q000401:mortality*; D049628:Body Size; D001026:Coronary Artery Bypass / Q000379:methods / Q000401:mortality*; D005260:Female; D006801:Humans; D008297:Male; D018570:Risk Assessment; D012737:Sex Factors; D016019:Survival Analysis