Received: 23 February 2021
Accepted: 13 September 2021
First Online: 21 October 2021
: This study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board (IRB) of Beijing Children’s Hospital, Capital Medical University. The patient’s parent signed an informed consent form.
: Not applicable. The publication of the paper has been confirmed by all the authors and patients’ guardians.
: The authors declare that they have no competing interests.