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Summary
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Keywords:
Age FactorsBehaviorBiologyBlood Coagulation EffectsCardiovascular EffectsContraceptionContraceptive Methods--contraindicationsContraceptive Methods--indicationsDelivery Of Health CareDemographic FactorsEnglandFamily PlanningFamily Planning PersonnelHealthHealth PersonnelHematological EffectsHemic SystemOral Contraceptives--contraindicationsOral Contraceptives--indicationsPhysiciansPhysiologyPopulationPopulation CharacteristicsSmokingWomen