1. Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL 32610, USA.
2. Division of Thoracic and Cardiovascular Surgery, Department of Surgery, University of Florida, Gainesville, FL 32610, USA.
3. Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, University of Florida, Gainesville, FL 32610, USA.