1. Institute of Public Health, Heidelberg University, Heidelberg, Germany.
2. International Health Group, Liverpool School of Tropical Medicine, Liverpool, England.
3. School of Public Health, Fudan University, Shanghai, China.
4. Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
5. Institute for Global Health, Karolinska Institute, Stockholm, Sweden.
6. Centre for Health Policy Studies, School of Public Health, Zhejiang University School of Medicine, 866 Yuhangtang Road, Hangzhou 310058, China.