Zhang, Puyan
Zhao, Qichun
Shang, Xifu
Wang, Yingming
Article History
Received: 30 November 2017
Accepted: 13 April 2018
First Online: 16 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was obtained from the hospital Ethics Committee. Authors had to obtain patient consent before enrolling participants in this study.
: Informed consent was obtained from all individual participants included in the study.