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Authors
Gu, Linni
Deng, Jianjun
Xu, Huiwen
Zhang, Shengfa
Gao, Min
Qu, Zhiyong
Zhang, Weijun
Tian, Donghua http://orcid.org/0000-0003-1356-6831
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Article History
Received: 14 December 2018
Accepted: 4 January 2019
First Online: 22 March 2019
Ethics approval and consent to participate
: All study procedures were approved by Ethical Review Board of Beijing Normal University. Written consent was obtained from all participants before data collection.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
