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Article History

Received: 10 October 2017

Accepted: 17 September 2018

First Online: 3 October 2018

Ethics approval and consent to participate

: Written informed consent was obtained from all involved individuals. The study was performed according to the Declaration of Helsinki and the protocol was approved by the Central Medical Ethics Committee of Latvia.

: The patient and both of his parents have given written informed consent for publication.

: The authors declare that they have no competing interests.

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