Affiliation: | 1.Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA;2.Division of Thoracic Surgery, Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA;3.Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA;4.Department of Medicine, West Virginia University, Morgantown, WV, USA |