Hu, Chuan
Yang, Jiaxin
Huang, Zhangheng
Liu, Chuan
Lin, Yijun
Tong, Yuexin
Fan, Zhiyi
Chen, Bo
Wang, Cailin
Zhao, Cheng-Liang
Article History
Received: 18 March 2020
Accepted: 22 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: We received permission to access the research data file in the SEER program from the National Cancer Institute, US (reference number 15260-Nov2018). Approval was waived by the local ethics committee, as SEER data is publicly available and de-identified.
: Not applicable.
: The authors declare that they have no competing interests.