Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (CR131_156385 /1)
Department of Health and Social Services of Canton Ticino
Received: 25 May 2017
Accepted: 29 January 2018
First Online: 16 February 2018
Ethics approval and consent to participate
: Study procedures were reviewed by the Canton Ticino Ethics Committee and voted “exempt” from human research ethics approval in accordance with Swiss law. According to the recommendations of the Helsinki Declaration, all participants, both children and parents, provided informed consent and voluntarily provided their data.
: Not applicable.
: The authors declare that they have no competing interests.
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