1. University of Tennessee College of Medicine, Chattanooga, Department of Respiratory, Critical Care, and Sleep Medicine, Chattanooga, Tennessee;
2. UHS Wilson Medical Center, Department of Cardiovascular Disease, Johnson City, New York;
3. Harvard Medical School, Department of Epidemiology, Brigham and Women’s Hospital, Department of Medicine, Boston, Massachusetts;
4. University of California, San Diego, Department of Family Medicine and Public Health, La Jolla, California;
5. University at Buffalo Department of Epidemiology and Environmental Health, Buffalo, New York;
6. Center for Primary Care and Prevention, Memorial Hospital of Rhode Island, Pawtucket, Rhode Island;
7. Warren Alpert School of Medicine of Brown University, Department of Family Medicine, Providence, Rhode Island;
8. Brown University School of Public Health, Department of Epidemiology, Providence, Rhode Island