[1] Univ Maryland, Baltimore, MD 21201 USA
[2] RTOG, Philadelphia, PA USA
[3] Wake Forest Univ, Bowman Gray Sch Med, Winston Salem, NC USA
[4] Mayo Clin, Minneapolis, MN USA
[5] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[6] Wayne State Univ, Sch Med, Detroit, MI USA
[7] Barrow Neurol Inst, Phoenix, AZ 85013 USA
[8] Radiol Imaging Associates, Denver, CO USA
[9] Triangle Neurosurg, Raleigh, NC USA
[10] Mid Columbia Med Ctr, The Dalles, OR USA
[11] Arizona Oncol Serv, Phoenix, AZ USA
[12] Cleveland Clin Fdn, Cleveland, OH 44195 USA
[13] Med Coll Wisconsin, Milwaukee, WI 53226 USA
[14] Univ Montreal, Notre Dame Hosp, Montreal, PQ H3C 3J7, Canada
[15] Univ Western Ontario, London, ON, Canada
[16] Cross Canc Inst, Edmonton, AB T6G 1Z2, Canada
[17] Emory Univ, Sch Med, Atlanta, GA USA