Funding for this research was provided by:
Collaborative Innovation Center for Water Treatment Technology and Materials (SS201866)
Scientific research project of Jiangsu Health Commission (H2018010)
Nantong Science and Technology Project (MS22019002)
Article History
Received: 10 October 2020
Accepted: 26 January 2021
First Online: 15 February 2021
Compliance with ethical standards
:
: The authors have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Affiliated Hospital of Nantong University and with the 1964 Helsinki declaration and its later amendments.
: Informed consent was obtained from all the parents or guardians of the eligible children included in the study.