Received: 31 May 2019
Accepted: 27 September 2019
First Online: 13 October 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Third Affiliated Hospital of Zhengzhou University. Informed consent for publishing data and images was obtained from the parents before performing the genetic test.
: A copy of the written consent is available for review by the editor of this journal.
: The authors declare that they have no competing interests.