1. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Miami, Miami, Florida;
2. Pulmonary Section, Department of Medicine, and
3. Department of Primary Care Medicine, Miami Veterans Affairs Medical Center, Miami, Florida;
4. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, University of Florida, Gainesville, Florida; and
5. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri