Song, Lingling
Zhang, Yong
Chen, Ting
Maitusong, Patimaihan
Lian, Xuemei
Article History
Received: 15 November 2021
Accepted: 12 January 2022
First Online: 26 January 2022
Declarations
:
: The ethics approval was obtained by the review board from the University of North Carolina at Chapel Hill, National Institute for Nutrition and Food Safety, China Center for Disease Control. All parents gave written informed consent for their children’s participation in the survey, and data were anonymized for the analysis.
: Not applicable
: The authors declare that there are no conflicts of interest to report.