Liu, Yongmei
Zhao, Peiling
Cheng, Mingliang http://orcid.org/0000-0002-4528-5076
Yu, Lei
Cheng, Zhuo
Fan, Linda
Chen, Chi
Funding for this research was provided by:
National Nature Science Foundation of China (No. 81570543)
Article History
Received: 4 September 2018
Accepted: 20 November 2018
First Online: 3 December 2018
Ethics approval and consent to participate
: This study was a second analysis of existing data; the data were anonymous, and the requirement for informed consent was therefore waived.
: Not applicable.
: Authors declare that they have no competing interests.
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