1. Department of Anesthesia and Perioperative Care, University of California, San Francisco2Department of Anesthesia and Perioperative Care, Department of Veterans Affairs Medical Center, San Francisco, California
2. Cardiology Section, Department of Medicine, Department of Veterans Affairs Medical Center, Denver, Colorado
3. Center for Medication Safety, Pharmacy Benefits Management Services, Department of Veterans Affairs Medical Center, Hines, Illinois
4. Department of Biostatistics, University of Colorado, Denver6Adult and Child Center for Outcomes Research and Delivery Science (ACCORDS) and Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora