1. Division of Pulmonary Diseases, Critical Care and Environmental Medicine, Tulane University Health Sciences Center, New Orleans, Louisiana
2. Division of Thoracic Surgery and Interventional Pulmonology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
3. Division of Pulmonary Diseases and Critical Care, University of Florida Health, Gainesville, Florida; and
4. Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Jacksonville, Florida