Funding for this research was provided by:
Chongqing Science and Technology Benefiting project (cstc2016kjhmpt1001)
Text and Data Mining valid from 2020-01-21
Received: 26 June 2019
Accepted: 12 January 2020
First Online: 21 January 2020
Ethics approval and consent to participate
: The research project was approved by the Ethics Committee of Daping Hospital, Army Medical University (No. 2018–119). All the participants received informed consent.
: Not applicable.
: The authors declare that they have no competing interests.