Violita, Fajrin
Hadi, Ella Nurlaela
Article History
Received: 9 July 2018
Accepted: 22 February 2019
First Online: 11 March 2019
Ethics approval and consent to participate
: Approval was obtained from the Health Research Ethics Committee of the Faculty of Public Health at the University of Indonesia (Certificate Number 75/UN2.F10/PPM.00.02/2018).Consent to participate was obtained from participants in written format. For participants under 16 years old, written informed consent was obtained from them, the school (written informed consent from the teacher), and also their parents (verbal informed consent) obtained.
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