[1] Bon Secours Canc Inst, DePaul Med Ctr, Norfolk, VA USA
[2] NRG Oncol Statistice & Data Management Ctr, Philadelphia, PA USA
[3] Emory Univ, Atlanta, GA 30322 USA
[4] Cedars Sinai, Los Angeles, CA USA
[5] John Muir Med Ctr, Walnut Creek, CA USA
[6] Washington Univ, Sch Med, St Louis, MO USA
[7] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[8] BC Canc Agcy, Kelowna, BC, Canada
[9] Univ Hlth Network, Princess Margaret Canc Ctr, Radiat Med Program, Toronto, ON, Canada
[10] Christiana Care Hlth Serv Inc, CCOP, Newark, DE USA
[11] Canc Ctr Northern Arizona, Sedona, AZ USA
[12] Univ Texas MD Anderson Canc Ctr, Div Radiat Oncol, Houston, TX 77030 USA
[13] Coastal Carolina Radiat Oncol, Wilmington, NC USA
[14] Radiat Oncol Ctr, Sacramento, CA USA
[15] South Suburban Oncol Ctr, Quincy, MA USA
[16] Univ Calif San Francisco, Helen Diller Family Comprehens Canc Ctr, San Francisco, CA 94143 USA