Xiang, Yuanxi
Zare, Hossein
Guan, Cuiling
Gaskin, Darrell
Funding for this research was provided by:
the Program of 2018 Study Abroad for Young Scholar sponsored by Education Department of Hubei Province in China ([2017]46)
the National Natural Science Youth Foundation (G0308, No. 71603077)
Article History
Received: 18 April 2018
Accepted: 3 December 2018
First Online: 29 December 2018
Ethics approval and consent to participate
: The original CHARLS was approved by the ethics review committee of Peking University, and all participants gave written informed consent at the time of participation.
: Not applicable.
: On behalf of all coauthors, the first author declares no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.