Zhang, Hui
Bai, Fengxin
Song, Hongling
Yang, Jun
Wang, Xinlong
Ye, Qingfang
Zhou, Yuqiu
Funding for this research was provided by:
National Natural Science Foundation of China (NO.71603064)
Health Committee of Hei Longjiang Province (NO.2019-079)
Article History
Received: 16 September 2020
Accepted: 10 September 2021
First Online: 23 September 2021
Declarations
:
: The study had approved by the Ethics Committee of Harbin Medical University (Daqing) and the written informal consent had obtained from all the primary caregivers of the children.
: Not applicable.
: The authors declare that they have no competing interests.