Funding for this research was provided by:
Krebsforschung Schweiz (KFS-3008-08-2012)
Bundesamt für Gesundheit (0)
Universität Basel (0)
Received: 11 February 2020
Accepted: 27 July 2020
First Online: 4 August 2020
Ethics approval and consent to participate
: The PELICAN study was approved by the Human Research Committees from the 11 Swiss cantons where the recruiting institutions were situated (lead committee: ethics committee of canton Zurich, KEK ZH Nr. 2012–0537). All parents signed the informed consent documents before receiving the study questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.