1. Division of Pulmonary, Critical Care and Sleep Medicine, University of Miami , Miami, FL 33136, USA
2. The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. , Bethesda, MD 20817, USA
3. Division of Infectious Diseases, Johns Hopkins University School of Medicine , Baltimore, MD 21205, USA
4. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine , Baltimore, MD 21205, USA
5. Department of Emergency Medicine, Johns Hopkins University School of Medicine , Baltimore, MD 21205, USA
6. Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA