title: Time-varying risk behaviors among adolescents: implications for enhancing the effectiveness of sexual risk reduction interventions.
authors.affiliation: Research Department, ETR, Scotts Valley, California.
authors.forename: Karin K
authors.initials: KK
authors.lastname: Coyle
authors.affiliation: Rollins School of Public Health, Emory University, Atlanta, Georgia.
authors.forename: Ralph J
authors.initials: RJ
authors.lastname: DiClemente
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012725:Sexual Behavior; D012747:Sexual Partners