Received: 24 May 2019
Accepted: 24 September 2019
First Online: 9 October 2019
Ethics approval and consent to participate
: This study was approved by the Children’s Hospital of Chongqing Medical University Ethics Committee.No laboratory animals were used in the study.
: This work was performed and published with the written consent of the patient’s family.
: The authors declare that they have no competing interests.