Article History
Accepted: 12 April 2021
First Online: 2 June 2021
Declarations
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: Minet de Wied, Wim Meeus, and Anton van Boxtel declare that they have no conflict of interest.