Received: 3 May 2018
Accepted: 9 November 2018
First Online: 29 November 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the University of Cape Town’s Faculty of Health Sciences Human Research Ethics Committee (ethical approval no. 523/2016). Thereafter, permission was obtained from the Western Cape Education Department, school principals, teachers and parents of participants. Assent was additionally collected from participants at baseline and at six months after intervention.
: The Western Cape Education Department, school governing bodies, school principals, teachers, parents of participants, participants, the University of Cape Town departmental and divisional reviewers provided consent for publication.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.