Zhang, Jingjing
Tian, Yongji
Li, Deling
Niu, Gang
Lang, Lixin
Li, Fang
Liu, Yuhan
Zhu, Zhaohui
Chen, Xiaoyuan http://orcid.org/0000-0002-9622-0870
Article History
Received: 2 February 2019
Accepted: 4 June 2019
First Online: 3 July 2019
Compliance with ethical standards
:
: None.
: 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 principles of the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study and their legal guardians.