Vanhelst, Jérémy
Vidal, Florian
Drumez, Elodie
Béghin, Laurent
Baudelet, Jean-Benoît
Coopman, Stéphanie
Gottrand, Frédéric
Article History
Received: 22 June 2018
Accepted: 18 March 2019
First Online: 2 April 2019
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of the University of <i>Lille</i> (Comité Protection des Personnes, Nord Ouest IV, Lille, France). All procedures were performed according to the ethical standards of the Helsinki Declaration of 1975, as revised in 2008, and European Good Clinical Practice. All parents/guardians signed an informed consent form, and the adolescents agreed to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.