Funding for this research was provided by:
Natural Science Foundation of Shanxi Province (No.2020JQ-534)
Received: 6 August 2021
Accepted: 28 September 2021
First Online: 23 November 2021
: The study protocol was approved by the Ethics Committee of First Affiliated Hospital of Xi’an Jiaotong University.Written informed consent was obtained from all the study subjects’ parents before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.