Funding for this research was provided by:
Schweizerische Akademie der Medizinischen Wissenschaften (KZS 07/17)
Article History
Received: 17 October 2018
Accepted: 8 February 2019
First Online: 21 February 2019
Ethics approval and consent to participate
: The ethical commission of the Canton of Zurich confirmed an exemption from the ethics review (BASEC Req-2017-00817). Parents were informed in writing on the aims of the study, their free choice in participation and their rights to recall the data at any time. Parents actively consented to participate by returning the filled in questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.
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