[1
]
Saw Swee Hock School of Public Health, National University of Singapore, Singapore.
[2
]
China Center for Health Economic Research, Peking University, Beijing, China; National
School of Development, Peking University, Beijing, China. Electronic address: gordonliu@nsd.pku.edu.cn.
[3
]
Department of Clinical Pharmacy and Outcomes Sciences, University of South Carolina,
Columbia, SC, USA.
[4
]
China Center for Health Economic Research, Peking University, Beijing, China.
[5
]
China Center for Health Economic Research, Peking University, Beijing, China; Department
of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario,
Canada.
[6
]
Health Services Research Centre, Akershus University Hospital, Lørenskog, Norway;
Department of Health Management and Health Economics, University of Oslo, Oslo, Norway.