1. Research and Evaluation Department, Kaiser Permanente Southern California , 100 S Los Robles Ave, 2nd Floor, Pasadena, CA 91101 , USA
2. Department of Emergency Medicine and Leonard Davis Institute, University of Pennsylvania , Philadelphia, PA 19104 , USA
3. Oregon Health and Science University, Knight Cardiovascular Institute , Portland, OR 97239 , USA
4. Division of Cardiology, Kaiser Permanente Southern California, Los Angeles Medical Center , Los Angeles, CA 90027 , USA
5. Division of Cardiology, University of California , San Francisco, CA 94143 , USA
6. Clinical Science Department, Kaiser Permanente Bernard J. Tyson School of Medicine , Pasadena, CA 91101 , USA