James D. Cox, MD, Professor and Head, Division of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA.
Waun Ki Hong, MD, American Cancer Society Clinical Research Professor, Charles A. LeMistre Distinguished Chair in Thoracic Oncology and Professor and Chairman, Department of Thoracic/Head and Neck Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA.