Funding for this research was provided by:
Text and Data Mining valid from 2019-12-01
Received: 12 August 2019
Accepted: 6 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: The studies were approved by the medical–ethical committee of the University of Antwerp with reference number A03 053 (FLESHI), UA A08 09 (FLEHSII), and B300201316515 (FLEHSIII). Informed consent was obtained from the participating adolescent as well as from a parent.
: This manuscripts does not contain individual person’s data.
: The authors declare that they have no competing interests.