Börnhorst, Claudia
Russo, Paola
Veidebaum, Toomas
Tornaritis, Michael
Molnár, Dénes http://orcid.org/0000-0002-3675-7019
Lissner, Lauren
Mårild, Staffan
De Henauw, Stefaan
Moreno, Luis A. http://orcid.org/0000-0003-0454-653X
Floegel, Anna
Ahrens, Wolfgang http://orcid.org/0000-0003-3777-570X
Wolters, Maike http://orcid.org/0000-0002-4943-2141
Article History
Received: 22 January 2019
Revised: 8 July 2020
Accepted: 3 September 2020
First Online: 17 September 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Ethical approval was obtained from the institutional review boards of all eight study centers. All procedures performed 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. Before children entered the study, parents provided written informed consent. Additionally, children 12 years and older gave written consent. Younger children gave oral consent for examinations and sample collection. Ethical approval was obtained from the institutional review boards of all eight study centers.