Shi, Huifeng
Wang, Yuanyuan
Li, Mengshi
Tan, Chang
Zhao, Chunxia
Huang, Xiaona
Dou, Yan
Duan, Xiaoqian
Du, Yufeng
Wu, Tianchen
Wang, Xiaoli
Zhang, Jingxu
Funding for this research was provided by:
United Nations Children’s Fund (860/A0/05/502/001/032)
Article History
Received: 26 September 2020
Accepted: 13 April 2021
First Online: 29 April 2021
Declarations
:
: This study was conducted according to the guidelines laid down in the Declaration of Helsinki and all process of this study was reviewed and approved by Peking University’s Biomedical Ethics Review Committee (No. IRB00001052–17109). Written informed consent was obtained from all caregivers before data collection.
: Not applicable.
: The authors declare that they have no competing interests.