Article History
Received: 8 May 2018
Accepted: 22 June 2018
First Online: 2 July 2018
Compliance with ethical standards
:
: The authors have no conflict of interest to declare.
: Informed consent was provided to all participants.
: This study was reviewed and approved by the Institutional Review Board of the First Hospital Affiliated to Bengbu Medical College, ID#20171015.