[1] Duke Univ, Sch Med, Durham, NC USA
[2] Univ Chicago, Chicago, IL 60637 USA
[3] Cedars Sinai Med Ctr, Los Angeles, CA 90048 USA
[4] Emory Univ, Winship Canc Inst, Atlanta, GA 30322 USA
[5] Univ Calif Los Angeles, Los Angeles, CA USA
[6] Univ Texas Hlth Sci Ctr San Antonio, San Antonio, TX 78229 USA
[7] York Canc Ctr, York, PA USA
[8] London Reg Canc Program, Dept Radiat Oncol, London, ON, Canada
[9] Washington Univ, Sch Med, St Louis, MO USA
[10] McMaster Univ, Hamilton, ON, Canada
[11] Kaiser Permanente, Santa Clara, CA USA
[12] Med Coll Wisconsin, Milwaukee, WI 53226 USA
[13] Brigham & Womens Hosp, Dana Farber Canc Inst, 75 Francis St, Boston, MA 02115 USA
[14] Mayo Clin, Rochester, MN USA
[15] McGill Univ, Montreal, PQ, Canada
[16] Univ Rochester, Med Ctr, Rochester, NY 14642 USA
[17] Duke Univ, Med Ctr, Durham, NC USA
[18] NRG Oncol, Philadelphia, PA USA