Funding for this research was provided by:
Major Research Plan (71373092)
Text and Data Mining valid from 2019-01-30
Received: 23 October 2018
Accepted: 23 January 2019
First Online: 30 January 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Tongji Medical College, Huazhong University of Science and Technology (NO: IORG 0003571).Written consent was obtained from each participant in current study.
: Written consent for publication was obtained from each participant prior to the survey.
: The authors declare that they have no competing interests.
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