title: Invited commentary.
authors.affiliation: Division of Cardiac Research, Eastern Colorado Health Care System, Denver Veterans Affairs Medical Center, 820 Clermont St, No. 112R, Denver, CO 80220, USA. laurie.shroyer@va.gov
authors.forename: A Laurie W
authors.initials: AL
authors.lastname: Shroyer
mesh_terms: D001026:Coronary Artery Bypass / Q000401:mortality / Q000706:statistics & numerical data*; D019992:Databases as Topic; D019918:Heart Valve Prosthesis Implantation / Q000401:mortality / Q000706:statistics & numerical data*; D017052:Hospital Mortality; D006801:Humans; D006278:Medicare