1. Pulmonary Section, and
2. Pulmonary, Allergy, Critical Care, and Sleep,
3. Division of Epidemiology and Community Health, and
4. Cardiology Section, Minneapolis VA Health Care System, Minneapolis, Minnesota;
5. Cardiovascular Division, University of Minnesota, Minneapolis, Minnesota;
6. Rollins School of Public Health, Emory University, Atlanta, Georgia;
7. Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts; and
8. Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California