Received: 11 June 2019
Accepted: 25 September 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: The Tianjin Children’s Hospital ethics committee approved this study (approval no.2016021). This study obtained the informed consent from the family members of the children.
: Written informed consent was obtained from the patient’s legal guardian for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
: The authors declare that they have no competing interest.