Affiliation: | ∗ Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York;† Department of Medicine, Thoracic Oncology Service, Memorial Sloan-Kettering Cancer Center; Weill Cornell Medical College, New York, New York;‡ Department of Radiation Oncology, Mount Sinai Medical Center, New York, New York;§ Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York;|| Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York |