Article History
Received: 14 February 2018
Revised: 27 June 2018
Accepted: 29 June 2018
First Online: 7 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Jingzhou Central Hospital, Jingzhou City, Hubei Province, China
: All the authors have approved the publication of this article.