Received: 16 July 2020
Accepted: 14 December 2020
First Online: 11 February 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of Shenzhen Children’s Hospital. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Written consent to publish this information was obtained from the parents of the study participants.
: The authors declare that they have no competing interests.