1. Division of Emergency Medicine, Stanford University School of Medicine, Stanford, California
2. Department of Emergency Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia3Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia
3. Division of Infectious Diseases, The Miriam Hospital, Providence, Rhode Island5Department of Infectious Diseases, Warren Alpert Medical School of Brown University, Providence, Rhode Island6currently affiliated with Boozman College of Public Health, Univer
4. Division of Emergency Medicine, Stanford University School of Medicine and Stanford Hospital, Stanford, California
5. Department of Medicine, Rush Medical College, Chicago, Illinois
6. Department of Infectious Diseases, Warren Alpert Medical School of Brown University, Providence, Rhode Island9Department of Emergency Medicine, Rhode Island Hospital, Providence