1 Department of Therapeutic Radiology, Yale University School of Medicine and Yale Cancer Center, New Haven, Connecticut. Electronic address: Lynn.wilson@yale.edu.
2 Department of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
3 Department of Radiation Oncology, Rutgers-Robert Wood Johnson Medical School, New Brunswick, New Jersey.
4 Department of Therapeutic Radiology, Yale University School of Medicine and Yale-New Haven Hospital, New Haven, Connecticut.