Text and Data Mining valid from 2020-04-03
Received: 9 January 2020
Accepted: 12 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: This study was conducted with approval from the Ethics Committee of Chinese PLA General Hospital. Written informed consent to participate was obtained from all participants.
: We have obtained consent to publish from the participants.
: The authors declare that they have no competing interests.