Funding for this research was provided by:
Department of Luohu Science and Technology (2018006)
Key Discipline of Luohu Neonatal Department (2019006)
Received: 20 November 2020
Accepted: 23 April 2021
First Online: 5 May 2021
: All procedures were approved by the Ethics Committee of Shenzhen Luohu Maternity and Child Health Hospital. Under the procedure approved by the Institutional Review Board (registry number: LL201804007), written informed consent was given and approved by the parents of the newborns.
: Not applicable.
: The authors declare that they have no competing interests.