Received: 21 July 2020
Accepted: 10 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: This study was approved and supervised by the ethics committee of the Children’s Hospital of Chongqing Medical University and was performed in accordance with the ethical standards of the 1964 Declaration of Helsinki. Informed written consent was obtained from all patients.
: All the patient data used in this study were approved by the guardian, and the informed consent forms were signed.
: The authors declare that they have no competing interests.