[1] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Boston, MA 02115 USA
[2] NRG Oncol Stat & Data Management Ctr, Philadelphia, PA USA
[3] Juravinski Canc Ctr Hamilton Hlth Sci, Hamilton, ON, Canada
[4] Indiana Univ, Indianapolis, IN 46204 USA
[5] Tulane Univ, New Orleans, LA 70118 USA
[6] Hop Notre Dame CHUM, Montreal, PQ, Canada
[7] Mayo Clin, Rochester, MN USA
[8] Einstein Med Ctr, Philadelphia, PA USA
[9] Med Coll Wisconsin, Milwaukee, WI 53226 USA
[10] Univ Michigan, Ann Arbor, MI 48109 USA
[11] Univ Vermont, Med Ctr, Burlington, VT USA
[12] Tom Baker Canc Clin, Calgary, AB, Canada
[13] McGill Univ, Ctr Hlth, Montreal, PQ, Canada
[14] Radiat Oncol Ctr, Sacramento, CA USA
[15] Wayne Radiat Oncol, Goldsboro, NC USA
[16] Cedars Sinai Med Ctr, Los Angeles, CA 90048 USA