Li, Jia
Sheng, Bo
Yu, Fan
Guo, Chunhua
Lv, Fajin
Lv, Furong
Yang, Haitao
Article History
Received: 15 August 2018
Revised: 7 January 2019
Accepted: 14 January 2019
First Online: 4 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.