1. Stanford Center on China's Economy and Institutions, Freeman Spogli Institute for International Studies Stanford University Stanford California USA
2. Department of Food and Resource Economics University of Florida Gainesville Florida USA
3. School of Management and Economics University of Electronic Science and Technology of China Chengdu People's Republic of China
4. National Center for Women and Children Health Chinese Center for Disease Control and Prevention Beijing People's Republic of China
5. Department of Child Health Care Sichuan Provincial Maternity and Child Health Care Hospital Chengdu People's Republic of China
6. Department of Economics Rice University Houston Texas USA