1. Department of Emergency Medicine Johns Hopkins University School of Medicine Baltimore Maryland USA
2. Division of Medical Toxicology, Ronald O. Perelman Department of Emergency Medicine NYU Grossman School of Medicine New York New York USA
3. Section of Emergency Medicine, Department of Medicine University of Chicago Chicago Illinois USA
4. Division of General Internal Medicine Johns Hopkins Bayview Medical Center Baltimore Maryland USA
5. Biostatistics Epidemiology and Data Management Core Johns Hopkins University School of Medicine Baltimore Maryland USA