1. Department of Emergency Medicine, Stanford University School of Medicine , Stanford, California, USA
2. Center for Clinical Informatics and Improvement Research, Department of Medicine, University of California, San Francisco , San Francisco, California, USA
3. Stanford Center for Biomedical Informatics Research, Stanford University , Stanford, California, USA
4. Kaiser Permanente Division of Research , Oakland, California, USA
5. Division of Hospital Medicine, Stanford University School of Medicine , Stanford, California, USA
6. Clinical Excellence Research Center, Stanford University School of Medicine , Stanford, California, USA