Funding for this research was provided by:
Sipkema foundation (n.a.)
Received: 6 November 2019
Accepted: 4 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: The study was reviewed and approved by the Ethics committee of the Erasmus University Medical Center (MEC 2016–357, NL57475.078.16).All participants and their parents gave written informed consent prior to study participation.
: Not Applicable.
: The authors declare that they have no competing interests.