Text and Data Mining valid from 2020-02-18
Received: 26 October 2019
Accepted: 10 February 2020
First Online: 18 February 2020
Ethics approval and consent to participate
: This study was approved by the institutional review board of Shanghai Sixth People’s Hospital (No:2018–106).
: The data of enrolled subjects was de-identified. This study was approved by the our institutional review board.
: All authors declare that they have no competing interests.