Funding for this research was provided by:
the Clinical Advanced Techniques, Primary Research & Development Plan of Jiangsu Province (BE2017719)
the Pediatric Medical Innovation Team of Jiangsu Province (CXTDA2017022)
Received: 19 August 2019
Accepted: 26 June 2020
First Online: 1 July 2020
Ethics approval and consent to participate
: The study complied with the Declaration of Helsinki and was approved by the Medical Ethics Committee of Jinling Hospital (Approval number: 2019NZGKJ-266). The committee waived the requirement for informed consent in consideration of the retrospective nature of the study and anonymous data analyses.
: Not applicable.
: The authors declare that they have no competing interests.