1. Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Brody School of Medicine East Carolina University Greenville North Carolina
2. Massachusetts General Hospital, Harvard Medical School Boston Massachusetts
3. Inova Health System, Virginia Cancer Specialists Fairfax Virginia
4. Department of Internal Medicine University of Michigan Ann Arbor Michigan
5. University of Pittsburgh Medical Center, Mercy Health Center Pittsburgh Pennsylvania
6. Division of Cardiothoracic Surgery University of Alabama at Birmingham Birmingham Alabama
7. Pinehurst Medical Clinic and FirstHealth Moore Regional Hospital Pinehurst North Carolina
8. Vanderbilt University Medical Center Nashville Tennessee
9. Virtua Medical Group Marlton New Jersey