[1] Univ Minnesota, Div Biostat, Minneapolis, MN USA
[2] Univ Calif San Francisco, San Francisco, CA 94143 USA
[3] McGill Univ, Ctr Hlth, Montreal, PQ, Canada
[4] Cleveland Clin, Dept Neurosurg, Cleveland, OH 44106 USA
[5] Cleveland Clin, Dept Radiat Oncol, Cleveland, OH 44106 USA
[6] Univ Wisconsin, Madison, WI USA
[7] Mayo Clin, Rochester, MN USA
[8] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[9] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Boston, MA USA
[10] Duke Univ, Med Ctr, Durham, NC USA
[11] Univ Colorado, Sch Med, Aurora, CO USA
[12] Univ Alabama Birmingham, Birmingham, AL USA
[13] Yale Univ, Sch Med, New Haven, CT USA
[14] Yale Univ, Ctr Canc, New Haven, CT USA
[15] Hofstra Univ, Long Isl City, NY USA
[16] Dartmouth Coll, Hanover, NH 03755 USA
[17] Dana Farber Canc Inst, Boston, MA 02115 USA
[18] Northwestern Univ, Chicago, IL 60611 USA