Received: 20 November 2019
Accepted: 29 April 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: Written informed consent was obtained from the patients, and for those patients under 16 years old, written consent was obtained from the parents on their behalf. This study was reviewed and approved by the ethical committee of Affiliated Children’s Hospital of Capital Institute of Pediatrics, China and Capital Characteristic Clinical Application Research(Z131107002213159).
: Written informed consent for publication of clinical details was obtained from all of the patients and written informed consent for publication of clinical details was obtained from the parents of the participant under the age of 18.
: The authors declare that they have no competing interests.