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Article History

Received: 27 June 2018

Accepted: 25 September 2018

First Online: 3 October 2018

Ethics approval and consent to participate

: The study was approved by the Medical Ethics Committee of the Universitas Indonesia. Informed written consent was obtained from the parents and assent was obtained from children and adolescents before commencement of the study.

: Not applicable.

: The authors declare that they have no competing interests.

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