Sun, Yujiao
Zhang, Haiyan
Tian, Wen
Shi, Liye
Chen, Ling
Li, Jinyang
Zhao, Shijie
Qi, Guoxian
Article History
Received: 21 November 2018
Accepted: 18 January 2019
First Online: 29 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict 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 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.