TY - JOUR A1 - Agha, S. A1 - Van Rossem, R. T1 - Impact of a school-based peer sexual health intervention on normative beliefs, risk perceptions, and sexual behavior of Zambian adolescents Y1 - 2004 DO - 10.1016/j.jadohealth.2003.07.016 JF - Journal of Adolescent Health VL - 34 IS - 5 SP - 441 EP - -452 ER -