1. From the Departments of Thoracic Imaging (G.S.S., C.D.S., J.A., E.U., M.T.T., I.V.), Thoracic/Head and Neck Medical Oncology (M.A.), and Pulmonary Medicine (A.S.), The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1478, Houston, TX 77030.