The Comparative Health Outcomes, Policy, and Economics (CHOICE) Institute, University of Washington, 1959 NE Pacific Street, H-375T, Box 357630, Seattle, WA, 98195-7630, USA. Department of Health Services, University of Washington, Seattle, USA. Hutchinson Institute for Cancer Outcomes Research and Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, USA. Department of Pediatrics, University of Washington, Seattle, USA. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, USA. National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, USA. The Emmes Company, LLC, Rockville, USA. Department of Pharmacy, University of Washington, Seattle, USA. The Comparative Health Outcomes, Policy, and Economics (CHOICE) Institute, University of Washington, 1959 NE Pacific Street, H-375T, Box 357630, Seattle, WA, 98195-7630, USA. bdevine@uw.edu. Department of Health Services, University of Washington, Seattle, USA. bdevine@uw.edu.