Zhao, Zhijian
Sun, Hongling
Zeng, Tao
Deng, Tuo
Liu, Yongda
Zeng, Guohua
Article History
Received: 3 January 2019
Accepted: 8 April 2019
First Online: 17 May 2019
Compliance with ethical standards
:
: The author(s) declare 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.