TY - JOUR AU - Cornwell, L D; Omer, S; Rosengart, T; Holman, W L; Bakaeen, F G TI - Changes over time in risk profiles of patients who undergo coronary artery bypass graft surgery: the Veterans Affairs Surgical Quality Improvement Program (VASQIP) JO - JAMA Surg IS - 04 VL - 150 PY - 2015 DO - 10.1001/jamasurg.2014.1700 L3 - PubMed-ID: 25671647 SP - 308 EP - 315 ER -