[1] Case Western Reserve Univ, Sch Med, Cleveland, OH USA
[2] Cleveland Clin, Cleveland, OH 44106 USA
[3] Washington Univ, Sch Med, St Louis, MO USA
[4] Harvard Med Sch, Massachusetts Gen Hosp, Dept Radiat Oncol, Boston, MA USA
[5] Mayo Clin, Dept Radiat Oncol, Rochester, MN USA
[6] Univ Michigan, Ann Arbor, MI 48109 USA
[7] Texas Oncol, Irving, TX USA
[8] Duke Univ, Med Ctr, Durham, NC USA
[9] Univ Chicago, Chicago, IL 60637 USA
[10] Univ Miami, Miami, FL USA
[11] Virginia Commonwealth Univ, Med Ctr, Richmond, VA USA
[12] Hunter Holmes McGuire Vet Affairs Med Ctr, Richmond, VA USA
[13] Thomas Jefferson Univ, Sidney Kimmel Med Coll, Sidney Kimmel Canc Ctr, Philadelphia, PA 19107 USA
[14] Cleveland Clin Fdn, 9500 Euclid Ave, Cleveland, OH 44195 USA