Text and Data Mining valid from 2020-03-18
Received: 19 October 2019
Accepted: 9 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Shanghai General Hospital, and written informed consent was provided by all patients according to our institutional standards.
: Not applicable.
: The authors declare that they have no competing interests.