Tang, Chengxiang
Xiong, Yao
Wu, Hongyan
Xu, Judy
Funding for this research was provided by:
National Natural Science Foundation of China (71463007)
National Social Science Foundation of China (16BGL097)
the National Natural Science Foundation of China (71473202)
Article History
Received: 6 February 2017
Accepted: 18 February 2018
First Online: 12 March 2018
Ethics approval and consent to participate
: Ethics approval was obtained from the Ethics Review Committee at the Affiliated Zhongshan Hospital of Xiamen University. We used implied consent and attached information statement before starting the survey.
: Not applicable.
: The authors declare that they have no competing interests.
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