1. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. Section of Pulmonary, Critical Care, and Sleep Medicine, Baylor College of Medicine, Houston, Texas
3. Center for Innovations in Quality, Effectiveness, and Safety, Michael E. DeBakey VA Medical Center, Houston, Texas
4. Department of Applied Mathematics and Statistics, Johns Hopkins University, Baltimore, Maryland
5. Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland
6. Department of Medicine, Johns Hopkins Bayview Medical Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
7. Department of Medicine, Rush University Medical Center, Chicago, Illinois
8. Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University School of Medicine, Baltimore, Maryland