Funding for this research was provided by:
National Natural Science Foundation of China (81470484)
National Key Research and Development Project (2016YFC1300403)
Fundamental Research Funds for the Central Universities (2018-XHQN19)
Text and Data Mining valid from 2018-12-01
Received: 13 September 2018
Accepted: 22 November 2018
First Online: 5 December 2018
Ethics approval and consent to participate
: The study protocol complied with the Declaration of Helsinki and was approved by the hospital ethics review board. Written informed consent was obtained from all the participants.
: The authors declare that they have no competing interests.
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