1 Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York; Department of Biostatistics and Computational Biology, University of Rochester School of Medicine and Dentistry, Rochester, New York. Electronic address: [email protected].
2 Department of Radiation Oncology, Kansas City VA Medical Center, Kansas City, Missouri; Department of Radiology, University of Missouri Kansas City School of Medicine, Kansas City, Missouri.
3 Department of Radiation Oncology, University of Washington, Seattle, Washington.
4 Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York.
5 NRG Oncology Statistics and Data Management Center, American College of Radiology, Philadelphia, Pennsylvania.