Funding for this research was provided by:
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (328-98-005)
Received: 27 December 2019
Accepted: 27 April 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: Ethical approval for the PHASE study was obtained from the research ethics committee of the Maastricht University Medical Centre (reference number 12–4-077). All participating children and parents provided informed consent.
: Not applicable.
: The authors declare that they have no competing interests.