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Keywords:
Acceptor CharacteristicsAcceptorsAge FactorsAmericasBiologyBlacksBreast FeedingCohort AnalysisData AnalysisDeveloped CountriesDeveloping CountriesEconomic FactorsEducational StatusEthnic GroupsFamily PlanningFamily Planning ProgramsFamily Planning, Behavioral MethodsGeographic FactorsHealthInfant Nutrition--changesLactationLactation, ProlongedMaternal AgeMaternal PhysiologyMultiple Classification AnalysisMultivariate AnalysisNonacceptor CharacteristicsNonacceptorsNorth AmericaNorthern AmericaNutritionPhysiologyResearch MethodologyResearch ReportResidence CharacteristicsSampling StudiesSocioeconomic FactorsSocioeconomic StatusStatistical StudiesStudiesSurveysTime FactorsUnited StatesWhites