Xu, Xing
Zheng, Guoliang
Zhang, Tao
Zhao, Yan
Zheng, Zhichao
Article History
Received: 9 December 2018
Accepted: 14 June 2019
First Online: 22 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest
: This study was approved by the Ethics Committee of Liao Ning Cancer Hospital.