1. Department of Cardiac Surgery, Division of Thoracic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
2. Department of Emergency Medicine and Anesthesia, Division of Critical Care, Emory University School of Medicine, Atlanta, GA, USA
3. Department of Medicine, Division of Pulmonary and Critical Care, Program in Trauma, University of Maryland School of Medicine, Baltimore, MD, USA
4. Department of Surgery, Division of Thoracic Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA