Text and Data Mining valid from 2020-05-07
Received: 6 November 2019
Accepted: 28 April 2020
First Online: 7 May 2020
Ethics approval and consent to participate
: All procedures involving human participants were performed in accordance with Shanghai Pudong Hospital ethical committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. All patients provided their written informed consent. The study protocol was approved by the Pudong Hospital Committee on human research.
: Written informed consent for publication was obtained from all the participants.
: The authors have no conflicts of interest to declare.