Received: 13 November 2019
Accepted: 1 September 2020
First Online: 2 October 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Board of the Xingtai People’s Hospital. Written participation and informed consent form from the both of parents was obtained before collecting blood samples.
: Written informed consent to publish identifying images and personal and clinical details was obtained from the parents.
: The authors declare that they have no competing interests.