Text and Data Mining valid from 2019-08-01
Received: 22 January 2019
Accepted: 30 May 2019
First Online: 1 August 2019
Ethics approval and consent to participate
: The authors have no ethical conflicts to disclose, and the institutional ethics committee approved this study.
: Patients’ parents gave written informed consent and approved photographs.
: The authors declare that they have no competing interests.