作者单位:Ohio State Univ, Wexner Med Ctr, James Canc Hosp, Dept Radiat Oncol, 460 W 10th Ave, Columbus, OH[1]Thomas Jefferson Univ, Dept Radiat Oncol, Sidney Kimmel Med Coll, Philadelphia, PA 19107 USA[2]Ohio State Univ, Wexner Med Ctr, Solove Res Inst, 460 W 10th Ave, Columbus, OH 43210 USA[3]Thomas Jefferson Univ, Dept Neurosurg, Sidney Kimmel Med Coll, Philadelphia, PA 19107 USA[4]