1 The Jefferson-National Jewish Health Korman Respiratory Institute, Department of Medicine, Division of Pulmonary and Critical Care Medicine, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, Pennsylvania (G.C.K., J.A.B., C.S.S.).
2 The Jefferson-National Jewish Health Korman Respiratory Institute, Department of Surgery, Division of Thoracic Surgery, Philadelphia, Pennsylvania (N.R.E.).