Text and Data Mining valid from 2019-11-11
Received: 29 July 2019
Accepted: 10 October 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration. This work was approved by the ethics and research committee of the First Affiliated Hospital of Nanjing Medical University (2016-SR-217), and informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.