[1] Fred Hutchinson Canc Res Ctr, Hutchinson Inst Canc Outcomes Res, 1124 Columbia St, Seattle, WA 98104 USA
[2] Univ Washington, Div Med Oncol, Thorac Head & Neck Program, Seattle Canc Care Alliance, Seattle, WA 98195 USA
[3] Univ Washington, Pharmaceut Outcomes Res & Policy Program, Seattle Canc Care Alliance, Seattle, WA 98195 USA