1. National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
2. Department of Sociology, The Ohio State University, Columbus, Ohio, USA
3. Institute for Population Research, The Ohio State University, Columbus, Ohio, USA
4. The Institute for International Programs, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
5. Department of Population Family and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA