Sun, Lixia http://orcid.org/0000-0003-3597-0341
Ning, Chunhong
Liu, Jiqiang
Yao, Tao
Zhang, Li
Zhao, Lei
Wei, Xiaoxuan
Zhang, Xiaoling
Gao, Yang
Zhang, Ruiying
Wu, Shouling
Article History
Received: 16 April 2019
Accepted: 11 July 2019
First Online: 27 July 2019
Compliance with ethical standards
:
: The authors declared that there is no duality of interest associated with this manuscript.
: This study was approved by the Ethics Committee of the Kailuan Medical Group, Kailuan Company, Tangshan, Hebei Province. Research has been conducted in accordance with the Declaration of Helsinki and its later amendments.
: This article does not contain any studies with animals performed by any of the authors.
: Written informed consent was obtained from all the participants of this study.