Funding for this research was provided by:
the Science and Technology Commission of Henan Province (162102310174)
Article History
Received: 17 April 2019
Accepted: 7 June 2019
First Online: 13 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Ethics Committee of the People’s Hospital of Zhengzhou University.
: Informed consent was obtained from all individual participants included in the study.