Text and Data Mining valid from 2020-02-11
Received: 19 August 2019
Accepted: 1 January 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: The research will be carried out in accordance with the ethical principles of the Helsinki Declaration concerning human research. The study protocol will include written informed consent from all participants and has the approval of the Ethical Committee of Zhongshan-Xuhui Hospital in January 2019 (2018043).
: Not applicable.
: The authors declare that they have no competing interests.