Zhang, Huimin
Xie, Peiling
Li, Zhuoying
Huang, Rong
Feng, Weiliang
Kong, Yanan
Xu, Feng
Zhao, Lin
Song, Qingkun
Li, Jing
Zhang, Baoning
Fan, Jinhu
Qiao, Youlin
Xie, Xiaoming
Zheng, Shan
He, Jianjun
Wang, Ke
Article History
Received: 17 January 2019
Accepted: 27 March 2019
First Online: 4 May 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethical Committee of centers including the First Affiliated Hospital of Xi’an Jiaotong University, Cancer Institute & Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, West China School of Public Health, Sichuan University, Zhejiang Cancer Hospital, Sun Yat-Sen University Cancer Center, Xiangya Second Hospital, Central South University and Liaoning Cancer Hospital. Patient consent for this study was not required due to the retrospective nature of our analysis.
: Not applicable.
: The authors declare that they have no competing interests.
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