Article History
Received: 4 October 2018
Accepted: 11 April 2019
First Online: 29 April 2019
Ethics approval and consent to participate
: Retrospectively registered. Patient data were reported to the “Commission Nationale Informatique et Libertés” under the number 2106953. Non-opposition verbal consent was obtained from the parents of the subjects.
: Not applicable.
: The authors declare that they have no competing interests.
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