1. Vanke School of Public Health, Tsinghua University, Beijing, China
2. School of Public Health, Peking University, Beijing, China
3. School of Health Humanities, Peking University, Beijing, China
4. School of Nursing, Capital Medical University, Beijing, China
5. Health Section Programme Division, UNICEF Headquarters, New York, NY, USA
6. School of Medicine, Tsinghua University, Beijing, China
7. Institute for Global Health, University College London, Bloomsbury, Bloomsbury, London, UK