| Affiliation: | 1. School of Public Health, Peking University, Beijing 100083, China;2. China Center for Health Development Studies, Peking University, Beijing 100083, China;3. School of Health Humanities, Peking University, Beijing 100083, China;4. Peking University Health Science Center-Chinese Center for Disease Control and Prevention Joint Center for Vaccine Economics, Beijing 100083, China;5. Key Laboratory of Reproductive Health National Health Commission of the People’s Republic of China, Beijing 100083, China |
