1. Department of Medicine and
2. Department of Pulmonary Medicine, Mayo Clinic Florida, Jacksonville, Florida
3. Department of Medicine, Virginia Commonwealth University, Richmond, Virginia
4. Department of Medicine, University of Utah, Salt Lake City, Utah
5. Department of Medicine, Baylor College of Medicine, Houston, Texas
6. Department of Medicine and Health Services, Policy and Practice, Brown University, Providence, Rhode Island; and
7. Department of Medicine, Stanford University, Stanford, California
8. Department of Epidemiology, University of Washington, Seattle, Washington