Li, Huixia
Xiao, Juan
Liao, Minghui
Huang, Guangwen
Zheng, Jianfei
Wang, Hua
Huang, Qun
Wang, Aihua
Funding for this research was provided by:
Hunan Provincial Science and Technology Department (2019SK1015)
Hunan Provincial Health Commission (20201924)
Article History
Received: 15 March 2020
Accepted: 16 June 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Hunan Provincial Maternal and Child Health Care Hospital (No.2019-S036). The study was conducted in accordance with the Declaration of Helsinki. Written informed consents were obtained from all the caregivers of children involved in this study.
: Not applicable.
: The authors declared that they have no competing interest.