Text and Data Mining valid from 2019-08-28
Received: 10 May 2019
Accepted: 20 August 2019
First Online: 28 August 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of The PLA Navy Anqing Hospital, and informed consent was obtained from all the subjects.
: Not applicable.
: The authors declare that they have no competing interests.