PhlebotomyBloodlettingHemochromatosisPolycythemiaIron OverloadAnemia, NeonatalPolycythemia VeraChelation TherapyFerritinsIronErythropoietinPorphyria Cutanea TardaHematocritBlood Specimen CollectionCerebrospinal Fluid PressureBlood Volume DeterminationAnemiaErythropoiesisBlood Component TransfusionHemoglobinsNitrilotriacetic AcidBlood TransfusionPhenylhydrazines