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Authors
Yu, Tongtong
Jiao, Yundi
Song, Jia
He, Dongxu
Wu, Jiake
Sun, Zhijun
Sun, Zhaoqing https://orcid.org/0000-0002-1608-7396
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Funding
Funding for this research was provided by:
grants from the Social Development Research Program of Liaoning Province (2011225020)
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Article History
Received: 18 February 2019
Accepted: 25 October 2019
First Online: 10 November 2019
Ethics approval and consent to participate
: This study complies with the Declaration of Helsinki, and Shengjing Hospital of China Medical University Research Ethics Committee approved the research protocol. Written informed consent was formally obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
