Funding for this research was provided by:
Fonds Wetenschappelijk Onderzoek (12Z1420N)
Horizon 2020 Framework Programme (643708, 643708, 643708, 643708, 643708, 643708, 643708, 643708, 643708, 643708)
Received: 20 January 2022
Accepted: 18 July 2022
First Online: 24 August 2022
: All methods were carried out in accordance with relevant guidelines and regulations.Informed consent was obtained from the parents/legally authorized representatives of the children and the parents involved in the study also provided informed consent.Ethical approval was granted by the Ethical Committee in all countries. More specifically, in Belgium the study was approved by the Medical Ethics Committee of the Ghent University Hospital; in Bulgaria, by the Ethics Committee of the Medical University of Varna and the Municipalities of Sofia and Varna, as well as the Ministry of Education and Science local representatives; in Finland, by the hospital district of Southwest Finland ethical committee; in Greece, by the Bioethics Committee of Harokopio University and the Greek Ministry of Education; in Hungary by the National Committee for Scientific Research in Medicine; and in Spain, the study was approved by the Clinical Research Ethics Committee and the Department of Consumers’ Health of the Government of Aragón.
: Not applicable.
: The authors declare that they have no conflict of interest.