1 Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
2 Department of Radiation Oncology, University of North Carolina, Chapel Hill, North Carolina; Carolina Health Informatics Program, School of Information and Library Science, University of North Carolina, Chapel Hill, North Carolina.
3 Department of Radiation Oncology, Dana Farber Cancer Institute and Brigham and Women's Hospital, Boston, Massachusetts.
4 Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
5 Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri.
6 Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, California.
7 Department of Radiation Oncology, University of North Carolina, Chapel Hill, North Carolina.
8 Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas. Electronic address: [email protected].