1. Department of Health Systems and Population Health, School of Public Health, University of Washington , Seattle, WA 98195 , United States
2. Collaboration for Outcomes Research and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia , Vancouver, BC V6T 1Z3 , Canada
3. Centre for Advancing Health Outcomes, Providence Health Care Research Institute , Vancouver, BC V6Z 1Y6 Canada
4. Center for Healthcare Policy and Research, University of California, Davis , Sacramento, CA 95817 , United States
5. Division of Health Policy and Management, Department of Public Health Sciences, University of California, Davis , Davis, CA 95616 , United States