1. Division of Pulmonary and Critical Care Medicine; Department of Medicine; University of California; Los Angeles CA
2. Division of Infectious Diseases; Department of Medicine; University of California; Los Angeles CA
3. Department of Medicine; Cedars-Sinai Medical Center; Los Angeles CA
4. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine; Duke University; Durham NC
5. Department of Pathology and Laboratory Medicine; University of California; Los Angeles CA
6. Division of Cardiothoracic Surgery; Department of Surgery; University of California; Los Angeles CA
7. Department of Biomathematics; University of California; Los Angeles CA