Funding for this research was provided by:
National Natural Science Foundation of China (81472006)
Undergraduate Innovation and Entrepreneurship Training Program (201790031048)
Text and Data Mining valid from 2019-08-05
Received: 3 January 2019
Accepted: 29 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: The study was approved by Ethics Committee of Daping Hospital, Army Medical University, Chongqing, China (Ethics Approval Number: 20, 2017). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study.
: All data published here are under the consent for publication.
: The authors declare that they have no competing interests.