1. Section of Pulmonary, Critical Care and Sleep Medicine, West Virginia University Department of Medicine, Morgantown, West Virginia
2. Department of Medicine VA Pittsburgh, Pittsburgh, Pennsylvania
3. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Office of Health Affairs, West Virginia University, Morgantown, West Virginia
5. University of Pittsburgh, Pittsburgh, Pennsylvania
6. Department of Behavioral Medicine and Psychiatry, West Virginia University, Morgantown, West Virginia