Xu, Xiaojia
Li, Yulian
Liang, Yaping
Yin, Mingjuan
Yu, Zuwei
Zhang, Yan
Huang, Lingfeng
Ni, Jindong
Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (2015A030313516)
social science and technology development project of Dongguan (2014108101040)
Article History
Received: 21 April 2018
Accepted: 20 July 2018
First Online: 28 July 2018
Ethics approval and consent to participate
: All students received written information and provided informed consent. The study was approved by the Research Ethics Committee of Guangdong Medical University (YJYS2018046).
: Not applicable.
: The authors declare that they have no competing interest.
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