Text and Data Mining valid from 2019-11-11
Received: 14 August 2019
Accepted: 31 October 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the General Hospital of People’s Liberation Army and in accordance with the standards of the National Research Council. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.