[1] Univ Washington, Comparat Hlth Outcomes Policy & Econ CHOICE Inst, Sch Pharm, 1959 NE Pacific St, Seattle, WA 98195 USA
[2] RTI Hlth Solut, Res Triangle Pk, NC USA
[3] Univ Washington, Dept Radiol, Sch Med, Seattle, WA 98195 USA
[4] Univ Washington, Dept Hlth Serv, Sch Publ Hlth, Seattle, WA 98195 USA
[5] Hutchinson Inst Canc Outcomes Res, Seattle, WA USA