1. Division of Pulmonary, Critical Care and Sleep Medicine, West Virginia University School of Medicine, Morgantown, West Virginia
2. Harvard Medical School, Boston, Massachusetts
3. Ruby Memorial Hospital, Morgantown, West Virginia
4. Department of Enterprise Finance and Business Planning, Ruby Memorial Hospital, Morgantown, West Virginia
5. Department of Medicine, West Virginia University School of Medicine, Morgantown, West Virginia
6. School for Environment and Sustainability, University of Michigan, Ann Arbor, Michigan
7. Department of Public Health, Morgantown, West Virginia