Text and Data Mining valid from 2019-09-06
Received: 18 September 2018
Accepted: 27 August 2019
First Online: 6 September 2019
Ethics approval and consent to participate
: The study received ethical approval from the Medical Ethical Committee of the VU University, Amsterdam, The Netherlands (no. 2017.397). Parents of participating children provided written informed consent. This trial is registered with the Netherlands National Trial Register (date of registration: 7th of September 2018; trial registration number: NTR7469).
: Not applicable.
: The authors declare that they have no competing interests.