1 China Center for Health Development Studies, Peking University, Beijing, China.
2 Department of Health Policy and Management, Schoolf of Public Health, Peking University, Beijing, China.
3 Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA.
4 International Vaccine Access Center, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA.
5 National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China.
6 China Center for Health Development Studies, Peking University, Beijing, China hfang@hsc.pku.edu.cn.
7 Peking University Health Science Center - Chinese Center for Disease Control and Prevention Joint Research Center for Vaccine Economics, Peking University, Beijing, China.