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Summary
No abstract available in PubMed .
Keywords:
BiologyDemographic FactorsDeveloping CountriesDevelopment PlanningEconomic FactorsFamily PlanningHealthInfant MortalityLactation, ProlongedLactation--indicationsLow Income PopulationMaternal PhysiologyMortalityNutritionPhysiologyPopulationPopulation DynamicsPregnancySocial ClassSocioeconomic FactorsSocioeconomic Status