Text and Data Mining valid from 2020-03-14
Received: 1 July 2019
Accepted: 9 March 2020
First Online: 14 March 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee for Research involving Human Subjects of Universiti Putra Malaysia, Selangor, Malaysia (Ref: UPM/TNCPI/RMC/220.127.116.11(JKEUPM)/F2). Permission for field data collection in secondary schools was attained from the Ministry of Education of Malaysia, as well as the Department of Education of Selangor state. In all cases, written consent was obtained from the board of the school, the principal, the parents and the adolescents prior to data collection.
: Not applicable.
: The authors declare that they have no competing interests.