Funding for this research was provided by:
Natural Science Foundation of Hunan Province (2019JJ80106)
Received: 8 March 2020
Accepted: 1 September 2020
First Online: 10 September 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Hunan Children’s Hospital.
: Waived by Ethics Committee of Hunan Children’s Hospital.
: The authors declare that they have no competing interests.