van Houdt, Carolien A. http://orcid.org/0000-0001-8830-6503
van Wassenaer-Leemhuis, Aleid G.
Oosterlaan, Jaap
Königs, Marsh
Koopman-Esseboom, Corine
Laarman, A. R. Céleste
van Kaam, Anton H.
Aarnoudse-Moens, Cornelieke S. H.
Funding for this research was provided by:
Stichting Kinderpostzegels Nederland
Cornelia Stichting
Stichting Zabawas
Stichting Elise Mathilde Fonds
Article History
Received: 10 September 2019
Accepted: 15 May 2020
First Online: 26 May 2020
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: This study has been approved by the appropriate Medical Ethical Committees and has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Parents of all children and, if applicable, children aged 12 years gave informed consent prior to inclusion in the study.