1. Department of Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. Center for Disease Dynamics, Economics & Policy, Washington DC
3. Division of Infectious Diseases, Department of Medicine
4. Armstrong Institute for Patient Safety and Quality, Johns Hopkins University School of Medicine, Baltimore, Maryland
5. Department of Internal Medicine, Texas A&M Health Science Center, Houston
6. Clinical Services Group, Hospital Corporation of America, Nashville, Tennessee
7. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
8. Princeton Environmental Institute, Princeton University, New Jersey