PhlebotomyBloodlettingHemochromatosisIron OverloadPolycythemiaAnemia, NeonatalPolycythemia VeraChelation TherapyFerritinsIronErythropoietinPorphyria Cutanea TardaHematocritBlood Specimen CollectionProgram EvaluationCerebrospinal Fluid PressureBlood Volume DeterminationAnemiaErythropoiesisHemoglobinsBlood Component TransfusionNitrilotriacetic AcidBlood TransfusionPhenylhydrazines