Harm ReductionHealth PolicyNeedle-Exchange ProgramsUnited StatesSubstance Abuse, IntravenousTobacco, SmokelessOpiate Substitution TreatmentMethadoneCongresses as TopicDrug and Narcotic ControlCodependency (Psychology)Group StructureStreet DrugsTobacco IndustryHIV InfectionsPolicy MakingNeedle SharingLaw EnforcementDrug UsersRisk-TakingSubstance-Related DisordersSyringesPrisonsSelf-Help GroupsPolicePublic HealthMarketingHungaryHomeless PersonsOrganizational PolicySmoking CessationSex WorkersPolicyConsensus Development Conferences as TopicSocial NetworkingOpioid-Related DisordersPublic PolicyPublic OpinionSmokingRisk Reduction BehaviorPrisonersHealth PromotionAttitude to HealthAlcohol DrinkingNarcoticsProstitutionWorld HealthSan FranciscoAlcoholism