[1
]Department of Radiation Oncology, Northwestern Memorial Hospital, Chicago, Illinois
60611
[2
]Excecutive Medical Physics Associates and Biophysics Research Institute of America,
Miami, Florida 33179
[3
]Department of Radiation Oncology, Boston Medical Center, Boston, Massachusetts 02118
[4
]Department of Radiation Oncology, University of North Carolina School of Medicine,
Chapel Hill, North Carolina 27516
[5
]Department of Radiation Therapy, Comprehensive Cancer Center of Nevada, Las Vegas,
Nevada 86169
[6
]Division of Cancer Treatment and Diagnosis, Rockville, Maryland 20892
[7
]University of Arkansas for Medical Sciences, Department of Radiation Oncology, Little
Rock, Arkansas
[8
]Loyola University Chicago, Edward Hines Jr. VA Hospital, Stritch School of Medicine,
Department of Radiation Oncology, Maywood, Illinois 60153
[9
]New York Proton Center, Department of Radiation Oncology, New York, New York 10035
[10
]Department of Radiation Oncology, University of Washington Medical Center, Seattle,
Washington 98195