Funding for this research was provided by:
National Natural Science Foundation of China (81571166, 81771361, 81820108014)
Text and Data Mining valid from 2019-10-30
Received: 21 June 2019
Accepted: 2 October 2019
First Online: 30 October 2019
Ethics approval and consent to participate
: Ethics approval for this study was obtained from the Second Affiliated Hospital of Harbin Medical University (2015-YAN-072). Written informed consent was obtained for all involved participants.
: Not Applicable.
: The authors declare that they have no competing interests.