1 Department of Radiation Oncology, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York.
2 Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
3 Herbert Irving Comprehensive Cancer Center, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York; Department of Neurology, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York.
4 Department of Neurology, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York.
5 Department of Radiation Oncology, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York; Department of Radiation Oncology, James J. Peters Veterans Affairs Medical Center, Bronx, New York.
6 Department of Radiation Oncology, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Vagelos College of Physicians and Surgeons and NewYork-Presbyterian, New York, New York. Electronic address: tjw2117@cumc.columbia.edu.