1. Department of Medicine, University of Washington , Seattle, WA 98195 , United States
2. Program on Policy Evaluation and Learning in the Pacific Northwest, University of Washington , Seattle, WA 98195 , United States
3. Department of Health Systems and Population Health, University of Washington School of Public Health , Seattle, WA , United States
4. Department of Medicine, University of Texas Southwestern Medical Center , Dallas, TX 75390 , United States
5. Program on Policy Evaluation and Learning , University of Texas Southwestern Medical Center, Dallas, TX , United States