Zheng, Wei
Zhu, Zhonglin
Zhang, Chao
Zhang, Hui
Article History
Received: 1 May 2019
Accepted: 4 September 2019
First Online: 19 September 2019
Compliance with ethical standards
:
: The authors declare no conflicts of interest in association with the present study.
: The project was approved by the Ethics Committee of Henan provincial people’s Hospital. Written informed consent was obtained from all subjects before enrollment in the study.