Quan, Hu
Ouyang, Linda
Zhou, Huijun
Ouyang, Yongzhong
Xiao, Hua http://orcid.org/0000-0002-4201-7842
Article History
Received: 2 November 2018
Accepted: 26 March 2019
First Online: 2 April 2019
Ethics approval and consent to participate
: The present study was approved by the ethics committee of Hunan Cancer Hospital, and informed consent was waived considering it is a retrospective investigation and observational in nature.
: Not applicable.
: The authors declare that they have no competing interests.
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