Wang, Yucheng
Chen, Kangwu
Chen, Hao
Zhang, Kai
Lu, Jian
Mao, Haiqing http://orcid.org/0000-0002-8778-6709
Yang, Huilin
Article History
Received: 15 December 2017
Accepted: 28 May 2018
First Online: 6 June 2018
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.