Department of Medicine, University of California, San Diego, La Jolla, California, United States of America.|Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America.|Winship Cancer Institute, Emory University, Atlanta, Georgia, United States of America.|Department of Medicine, University of California, San Diego, La Jolla, California, United States of America.