[1] Yale Univ, Sch Med, Dept Therapeut Radiol, New Haven, CT 06510 USA
[2] Univ Colorado Denver, Dept Radiat Oncol, Aurora, CO USA
[3] Univ Colorado, Dept Internal Med, Denver, CO 80202 USA
[4] Univ Colorado, Dept Med Oncol, Denver, CO 80202 USA
[5] Univ Calif San Francisco, San Francisco, CA 94143 USA
[6] Vanderbilt Univ, Med Ctr, Dept Radiat Oncol, Nashville, TN USA
[7] Yale Univ, Dept Med Oncol, New Haven, CT USA
[8] Yale Sch Med, Canc Outcomes Publ Policy & Effectiveness Res COP, New Haven, CT USA
[9] Yale Univ, Sch Med, Dept Neurosurg, New Haven, CT USA