Sun, Bin
Yu, DongHai
Chen, Ji
Tang, YongHui
Wu, Han
Article History
Accepted: 1 June 2018
First Online: 5 June 2018
Compliance with ethical standards
:
: All the authors (Bin Sun, DongHai Yu, Ji Chen, YongHui Tang, Han Wu) 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.