Zhang, Wenbo
Kang, Lei
Zhang, Yadi
Zhao, Liang
Zhu, Ruilin
Gu, Xiaopeng
Wu, Hailong
Wang, Xiaosha
Yang, Liu http://orcid.org/0000-0003-4450-8642
Funding for this research was provided by:
National Natural Science Foundation of China (81670841)
Natural Science Foundation of Beijing Municipality (7172218)
Article History
Received: 27 August 2019
Revised: 31 October 2019
Accepted: 3 December 2019
First Online: 14 December 2019
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.
: Informed consent was obtained from all the parents/legal guardians of the participants included in the study.