1 Division of Research and Modeling, Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality, Rockville, MD, United States; McCourt School of Public Policy, Georgetown University, Washington, DC, United States. Electronic address: William.Encinosa@ahrq.hhs.gov.
2 Division of Research and Modeling, Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality, Rockville, MD, United States.
3 Agency for Healthcare Research and Quality, Rockville, MD, United States.