COMPLIANCE WITH ETHICAL STANDARDS
Ethical approval: All procedures performed were in accordance
with the ethical standards of the institutional research committee and
with the 1964 Declaration of Helsinki and its later amendments. The
institutional review board of Sun Yet-Sun University Cancer Center
approved this retrospective study (approval number: B2020-132-01).
Informed consent: This is a retrospective study based on
hospital database. Study associated medical examination or treatment
won’t harm patients’ health, so informed consent has been exempted.
Availability of data and materials: The key raw data have been
deposited into the Research Data Deposit
(http://www.researchdata.org.cn; approval number: RDDA2020001520).
Author contributions: All authors contributed to the final
analysis and writing of the manuscript.
Acknowledgments: We are grateful to all doctors and nurses in
our department.