1 Department of International Health, Georgetown University, Washington, DC, USA. Electronic address: wz192@georgetown.edu.
2 Department of International Health, Georgetown University, Washington, DC, USA.
3 Georgetown University, Washington, DC, USA.
4 Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality, Rockville, MD, USA.
5 Formerly the World Bank, Washington, DC, USA; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
6 Health, Nutrition and Population Global Practice, The World Bank, Washington, DC, USA.
7 School of Social Work, University of Maryland, Baltimore, MD, USA.
8 School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Center for Health Technology Assessment, China Hospital Development Institute, Shanghai Jiao Tong University, Shanghai, China.