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Abstract
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Keywords:
AdolescentsAdolescents, FemaleAdolescents, MaleAge FactorsBehaviorContraceptionContraceptive UsageDemographic FactorsDeveloped CountriesEuropeFamily PlanningGermany, Federal Republic OfPopulationPopulation CharacteristicsResearch MethodologySampling StudiesSex BehaviorStudiesSurveysWestern EuropeYouth