Received: 8 February 2022
Accepted: 15 March 2022
First Online: 29 March 2022
: The ethics committee of the National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College approved this study (NCC 2017-YZ-026, October 17, 2017). Prior written informed consent was obtained from all study participants. All methods were performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.