Cao, Jingyi
Wang, Qichao
Wu, Gang
Li, Shasha
Wang, Qian
Article History
Received: 25 June 2018
Accepted: 7 August 2018
First Online: 16 August 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: 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.