PhlebotomyBloodlettingHemochromatosisIron OverloadPolycythemiaAnemia, NeonatalProgram EvaluationPolycythemia VeraChelation TherapyFerritinsIronErythropoietinPorphyria Cutanea TardaHematocritBlood Specimen CollectionProgram DevelopmentCerebrospinal Fluid PressureBlood Volume DeterminationAnemiaErythropoiesisHemoglobinsBlood Component TransfusionNitrilotriacetic AcidBlood TransfusionPhenylhydrazines