PhlebotomyBloodlettingHemochromatosisIron OverloadPolycythemiaAnemia, NeonatalPolycythemia VeraChelation TherapyFerritinsIronSpecimen HandlingErythropoietinBlood Specimen CollectionPorphyria Cutanea TardaHematocritCerebrospinal Fluid PressureBlood Volume DeterminationAnemiaErythropoiesisHemoglobinsBlood Component TransfusionNitrilotriacetic AcidBlood TransfusionPhenylhydrazines