Funding for this research was provided by:
National Natural Science Foundation of China (71373102)
Text and Data Mining valid from 2018-06-22
Received: 23 September 2016
Accepted: 11 June 2018
First Online: 22 June 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Research Ethics Committee at the Zhejiang University School of Medicine, China (2011.03.04). Informed consent for participation in the study was obtained from all respondents, in line with project REC approval.
: Not applicable.
: Hengjin Dong, Zhejiang University School of Medicine is a Section Editor of this journal.The authors declare that they have no competing interests.
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