2002i-178 2008a-319 305 acquiredimmunodeficiencysyndrome adolescence adolescent adolescentbehavior adolescentbehavior[mesh] adolescentdevelopment adolescenten adolescentpsychology aids(disease)inadolescence aids(disease)inchildren attitudes attitudetohealth automobileracing behaviormodification brazil childhood childsexualabuse communityandschool congresses corruptpractices decisionmaking decisionmakinginadolescence decisiontheory developmental epidemiology family governmentpolicy habitudessanitaireschezl'adolescent healthandhygiene healthbehavior healthbehaviorinadolescence healthpromotion healthriskassessment inadolescence inadolescence[mesh] ininfancy lifestages medischepsychologie motorcycleracing parenting peru prevention prisederisquechezl'adolescent problemyouth promotiondelasante psychology readinessforschool relationships risiconemen risk-taking risk-taking(psychology) risk-takinginadolescence riskassessment safesex schoolviolence sexualbehavior sexualharassmentineducation socialaspects socialconditions students suicidalbehavior suicide teenagers unitedstates ws462a23462007 ws462w9269a2001 youth