[1] Univ Texas Houston, MD Anderson Canc Ctr, Houston, TX 77030 USA
[2] RTOG, Philadelphia, PA USA
[3] Huntsman Canc Inst, Salt Lake City, UT USA
[4] CHUM Hop Notre Dame, Montreal, PQ, Canada
[5] Wayne State Univ, Med Ctr, Detroit, MI 48202 USA
[6] Thomas Jefferson Univ Hosp, Philadelphia, PA 19107 USA
[7] Univ Louisville, Louisville, KY 40292 USA