Text and Data Mining valid from 2019-09-10
Received: 28 February 2019
Accepted: 3 September 2019
First Online: 10 September 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. They were allowed by Suining Central Hospital ethics committee. And written, informed consent was obtained from all patients.
: Not Applicable.
: The authors declare that they have no competing interests.