Funding for this research was provided by:
Hunan Province Clinical Medical Technology Innovation Guidance Project in China (2020-237)
Received: 15 October 2020
Accepted: 7 April 2021
First Online: 17 April 2021
: Ethical clearance was obtained from the The Second Xiangya Hospital, Central South University. During data collection, written informed consent was obtained from each child family after briefly explaining the purpose, risk, and benefit of the study. All the procedure and purpose were told to the child, and verbal assent was also obtained from each child before any data collection and anthropometric measurements. Confidentiality of data was maintained by avoiding personal identifiers.
: Not applicable.
: The authors declare that they have no competing interests.