Funding for this research was provided by:
National Natural Science Foundation of China (81460225)
Text and Data Mining valid from 2019-07-29
Received: 16 April 2019
Revised: 27 June 2019
Accepted: 8 July 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: This study was approved by the Hospital Ethics Committee of the First Affiliated Hospital of Medical College of Shihezi University. Written consent is included in the attachment file.
: Not applicable.
: The authors declare that they have no competing interests.