Gao, Min
Sa, Zhihong
Li, Yanyu
Zhang, Weijun
Tian, Donghua
Zhang, Shengfa
Gu, Linni
Funding for this research was provided by:
Fundamental Research Funds for the Central Universities (SKZZB2014010)
Article History
Received: 31 January 2018
Accepted: 28 August 2018
First Online: 21 September 2018
Ethics approval and consent to participate
: The present study is a secondary analysis using the CLHLS data, and the ethical approval is waived by an IRB (IRB00001052–13074) to the CLHLS study that was approved by the research ethics committees of Duke University and Peking University. Thus, consent to participate from participants is deemed unnecessary for this study. The data were anonymized before its use.
: Not applicable.
: The authors declare that they have no competing interests.
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