1. Department of Emergency Medicine University of California–Davis, School of Medicine Sacramento California USA
2. Division of Rheumatology, Department of Internal Medicine University of California–Davis, School of Medicine Sacramento California USA
3. University of California–Davis School of Medicine Sacramento California USA
4. Department of Public Health Sciences University of California–Davis, School of Medicine Sacramento California USA
5. Department of Emergency Medicine Oregon Health and Science University Portland Oregon USA
6. Department of Medical Informatics and Clinical Epidemiology Oregon Health and Science University Portland Oregon USA
7. School of Medicine Oregon Health and Science University Portland Oregon USA