Liu, Wenlong http://orcid.org/0000-0003-1296-5144
Ouyang, Hong
Zeng, Qingxiang
Luo, Renzhong
Lu, Gen
Funding for this research was provided by:
National Natural Science Foundation of China (81500772)
Pearl River S and T Nova Program of Guangzhou (201710010085)
Natural Science Foundation of Guangdong Province (2014A030310216)
Article History
Received: 15 October 2018
Accepted: 18 January 2019
First Online: 23 January 2019
Compliance with ethical standards
:
: The authors 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 guardians of children included in the study.