Funding for this research was provided by:
Dutch Organisation for Scientific Research (328-98-007)
Article History
Received: 12 February 2018
Accepted: 10 August 2018
First Online: 15 August 2018
Ethics approval and consent to participate
: This study has been approved by the Medical Ethical Committee of Wageningen University (protocol number: NL47988.081.14)and has been registered with the Dutch Trial Register (NTR4621). For this study no written consent forms were obtained from the subjects. Passive consent was obtained from the parents. Youth professionals that administered the questionnaires informed the youths orally about their rights. After obtaining oral informed consent, youths received the questionnaire. This procedure was installed because the socially vulnerable youths in this study may have difficulties in interpreting the formal language of the informed consent letter.
: Not applicable
: The authors declare that they have no competing interests.
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