Guo, Junfei
Liu, Yueju
Jin, Lin
Yin, Yingchao
Hou, Zhiyong http://orcid.org/0000-0001-5838-4025
Zhang, Yingze
Article History
Received: 21 March 2018
Accepted: 4 June 2018
First Online: 15 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the institutional internal review board of the participating institution.
: For this type of study, formal consent is not required.