Huang, Shun
Peng, WenPing
Yang, Ning
Yu, Tao
Cui, Hong Yuan
Xu, Jing Yong
An, Qi
Yang, Hua
Liu, Yan Nan
Li, Zhe
Zuo, Ming Zhang
Article History
Received: 7 November 2017
Accepted: 1 February 2018
First Online: 12 February 2018
Compliance with ethical standards
:
: All authors have no conflict of interest to disclose.
: This retrospective study had been approved by the Beijing Hospital Institutional Review Board (2016BJYYEC-030-01).
: For this kind of study formal consent is not required.