Funding for this research was provided by:
Nationaal Regieorgaan Praktijkgericht Onderzoek SIA (2015-02-07P)
Text and Data Mining valid from 2019-03-07
Received: 31 December 2018
Accepted: 28 February 2019
First Online: 7 March 2019
Ethics approval and consent to participate
: The need for Ethical Approval was waived by The Medical Ethics Review Committee of the VU University Medical Center (reference number: 2016.310). The Committee stated that the Medical Research Involving Human Subjects Act (WMO) does not apply to this study and that an official approval of the study by the Committee is not required<i>.</i> The board of child care organization Impuls provided consent for inclusion of their preschools in this study. Furthermore, written informed consent was obtained from the ECEC teachers and the parents of toddlers.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.