Received: 21 January 2022
Accepted: 29 April 2022
First Online: 5 May 2022
: The study was approved by the Ethical Committee of Fujian Cancer Hospital (YKT2020-011-01) and was in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Patient identifiers such as names were not collected, instead patients were given a numerical identifier. Informed consent was obtained from all participants and for those under 18 years, from a parent or legal guardian. For confidentiality, the patients’ charts were used only within the confines of the records department and only the investigators and study assistant had access to the files.
: Not required.
: The authors declare that they have no competing interests.