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Abstract
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Keywords:
Acquired Immunodeficiency Syndrome--prevention and controlAmericasBarrier MethodsBehaviorCondomContraceptionContraceptive MethodsDeveloped CountriesDiseasesEconomic FactorsFamily PlanningHiv Infections--prevention and controlIndustryInfectionsMacroeconomic FactorsNorth AmericaNorthern AmericaOral ContraceptivesReproductive Tract InfectionsRisk Reduction BehaviorSex BehaviorSexually Transmitted Diseases--prevention and controlUnited StatesViral Diseases