1 Department of Thoracic Surgery, St. James's University Hospital, Leeds, England.
2 Section of Thoracic Surgery, Yale University School of Medicine, New Haven, CT.
3 Department of Medicine and the Division of Pulmonary, New York, NY.
4 Critical Care Medicine and Sleep Medicine, New York University School of Medicine, 550 First Ave, New York, NY 10016. Electronic address: Doreen.addrizzo@nyumc.org.