english: Unlike many studies, it’s relatively large — involving over 550 young adolescents at four schools, aged around 13 to 14.
non_english: Untuk kelompok Remaja Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â RpÂ Â Â 15.000.000,- ( 4 besar )