Xu, Hongwei
Xie, Yu
Funding for this research was provided by:
National Institute of Child Health and Human Development (R24HD041028)
National Natural Science Foundation of China (No. 71373012 and 71461137001)
MICSIMB program (small grant)
The Center for Social Research and Institute of Social Science Survey at Peking University
National Institute of Child Health and Human Development (R03HD082434-01A1)
Article History
Accepted: 16 January 2016
First Online: 25 January 2016