[1] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[2] Haaglanden Med Ctr, The Hague, Netherlands
[3] Brigham & Womens Hosp, Dept Neurosurg, 75 Francis St, Boston, MA 02115 USA
[4] Harvard Med Sch, Dept Radiat Oncol, Dana Farber Brigham & Womens Canc Ctr, Boston, MA 02115 USA