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Article History

Received: 23 December 2020

Accepted: 5 March 2021

First Online: 29 June 2021

Declarations

:

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This is an observational study. The regional ethics committee has confirmed that no ethical approval is required. 

: Informed consent was obtained from the parents or legal guardians.

: Parents or legal guardians provided written informed consent for the publication of clinical data and accompanying images. Additional informed consent was obtained from the parents of the individual participant for whom identifying information is included in this article.

: The authors declare no competing interests.