Wu, Shengrong
Yu, Fei
Ma, Liya
Zhao, Youhong
Zheng, Xin
Li, Xiaodong
Li, Zhiqiang
He, Xiangyi http://orcid.org/0000-0002-5687-0991
Zhou, Jianye
Article History
Received: 19 March 2020
Accepted: 15 July 2020
First Online: 22 July 2020
Compliance with Ethical Standards
:
: The authors declare that no conflict of interest exists in the study.
: Informed consent forms were signed by all participants included the mothers have provided the informed consent for their neonates in the study. All procedures performed in studies involving human participants met the ethical standards of the Ethics Committee of the School of Stomatology Lanzhou University (LZUE-201700012) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.