Rong, Dailin
Mao, Yize
Yang, Qiuxia
Xu, Shuhang
Zhao, Qianqian
Zhang, Rong http://orcid.org/0000-0003-1188-0640
Article History
Received: 18 September 2017
Revised: 27 November 2017
Accepted: 13 December 2017
First Online: 12 April 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Rong Zhang, Sun Yat-Sen University Cancer Center
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was not required for this study because this was a retrospective study
: Institutional Review Board approval was obtained.
: • retrospective• observational• performed at one institution