1. Division of Pulmonary, Critical Care & Sleep Medicine, Rhode Island Hospital, Providence, Rhode Island;
2. Department of Medicine and
3. Department of Psychiatry and Human Behavior, Warren Alpert Medical School, and
4. Center for Behavioral and Preventive Medicine, The Miriam Hospital, Providence, Rhode Island
5. Department of Health Services, Policy & Practice, School of Public Health, Brown University, Providence, Rhode Island; and