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Abstract
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Keywords:
Age FactorsAmericasClinical ResearchContraceptionContraceptive Methods ChosenContraceptive UsageDemographic FactorsDeveloped CountriesDeveloping CountriesEconomic FactorsFamily PlanningNorth AmericaNorthern AmericaPopulationPopulation CharacteristicsResearch And DevelopmentResearch MethodologyTechnologyUnited States