Yang, Xiaolin
Liu, Geling
Zang, Luyang
Li, Ding
Yu, Fang
Xiang, Xiuxiu
Li, Weijuan
Article History
Received: 6 March 2018
Accepted: 10 October 2018
First Online: 25 October 2018
Compliance with Ethical Standards
:
: All authors have no conflicts of interest.
: The Ethical Committee of Tangshan Gongren Hospital approved the study.
: Informed consent was obtained from all patients.