[1] Univ Washington, Dept Pharm, Comparat Hlth Outcomes Policy & Econ CHOICE Inst, Seattle, WA 98195 USA
[2] Stanford Univ, Dept Radiat Oncol, Stanford, CA 94305 USA
[3] Novant Hlth Forsyth Med Ctr, Dept Radiat Oncol, Winston Salem, NC USA
[4] Elysia Grp LLC, New York, NY USA