1. Division of Infectious Diseases, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
2. Division of Infectious Diseases, Department of Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
3. Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
4. Division of General Internal Medicine, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
5. Infectious Diseases Society of America, Arlington, Virginia, USA