Xiao, Shiqian
Geng, Xin
Zhao, Jianlan
Fu, Linlin
Article History
Received: 7 February 2018
Accepted: 28 October 2018
First Online: 5 December 2018
Compliance with ethical standards
:
: The authors Shiqian Xiao, Xin Geng, Jianlan Zhao, and Linlin Fu declare that they have no competing of interests.
: This study was approved by the ethic committee of Tianjin Hospital.