Article History
Received: 19 May 2020
Accepted: 22 September 2020
First Online: 2 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The Institutional Review Board of Henan Cancer Hospital approved this study.
: All patients or their family members signed the informed consents.