[1
]
Department of Radiation Oncology, University of Colorado School of Medicine, Aurora,
CO, USA.
[2
]
Department of Radiation Oncology, University of Southern California and Radiation
Oncology Program, Childrens Hospital of Los Angeles, Los Angeles, CA, USA.
[3
]
Department of Radiation Oncology, University of Pennsylvania, Perelman Center for
Advanced Medicine, Philadelphia, PA, USA.
[4
]
Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, USA.
[5
]
Department of Radiation Oncology, University of California San Diego, La Jolla, CA,
USA.
[6
]
Radiological Physics Center, UT MD Anderson Cancer Center, Houston, TX, USA.
[7
]
Department of Radiation Oncology, Washington University, St. Louis, MO, USA.
[8
]
Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA.
[9
]
Sun Nuclear Corporation, Melbourne, FL, USA.
[10
]
Department of Radiation Oncology, The Cleveland Clinic, Cleveland, OH, USA.
[11
]
Department of Medical Physics, University of Texas Health Sciences Center, San Antonio,
TX, USA.
[12
]
Department of Radiation Oncology, University of California Los Angeles, Los Angeles,
CA, USA.