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Article History

Received: 21 February 2019

Accepted: 26 April 2019

First Online: 14 May 2019

Ethics approval and consent to participate

: The medical ethics committee of the Erasmus University Medical Center Rotterdam has declared that the Medical Research Involving Human Subjects Act does not apply to this research protocol and issued a declaration of no objection for this study (registration number MEC-2018-1506).Therefore, this study can be carried out without further approval by an accredited medical ethical committee. This study has been entered into the Netherlands National Trial Register (NTR; ) under catalogue number NL7279 on 26 September 2018. Any important protocol modifications will be reported by the researchers to the funding body and the trial registry.Written informed consent will be asked from community stakeholders and youngsters for participation in the focus groups that are part of the process and implementation evaluation For youngsters aged 12 ≤ 16 years old the parents will also be asked to additionally give written informed consent before participating in the focus groups. Verbal informed consent will be asked from the key-leaders for the key-informant questionnaire, that is part of the process and implementation evaluation. Verbal informed consent is used among key-leaders as the questionnaire is administered by telephone. For the questionnaires among community stakeholders and all effect evaluation questionnaires informed consent is assumed by returning a completed anonymous questionnaire.

: Not applicable.

: The authors declare that they have no competing interests.

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