Yue, Di
Wu, Xiaowei
Song, Haichen
Zhou, Zhichun
Ye, Man
Zhu, Mengshan
Article History
Received: 31 January 2018
Accepted: 25 June 2018
First Online: 10 August 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest to disclose.
: All procedures performed in this study 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. For this type of study formal consent is not required.