[1] Duke Univ, Med Ctr, Dept Radiat Oncol, Durham, NC USA
[2] Univ N Carolina, Dept Med, Chapel Hill, NC USA
[3] Univ Chicago, Dept Radiat & Cellular Oncol, Chicago, IL USA
[4] Duke Univ, Med Ctr, Durham, NC USA
[5] Univ Chicago, Pritzker Sch Med, Chicago, IL USA
[6] Washington Univ, Dept Radiat Oncol, St Louis, MO USA
[7] Duke Univ, Durham, NC USA
[8] Duke Univ, Med Ctr, Dept Neurosurg, Durham, NC USA
[9] Univ Calif San Francisco, Dept Radiat Oncol, San Francisco, CA USA
[10] Univ Calif San Francisco, Bakar Computat Hlth Sci Inst, San Francisco, CA USA
[11] Durham VA Hlth Care Syst, Durham, NC USA