MethemoglobinMethemoglobinemiaOxyhemoglobinsSodium NitriteHemoglobinsCytochrome-B(5) ReductaseCarboxyhemoglobinHemoglobin, SickleSpectrophotometryErythrocytesOximetryHeminOxidation-ReductionHemeOxygenAnemia, Sickle CellKineticsElectron Spin Resonance SpectroscopyNitric OxideTransferrinSpectroscopy, Near-InfraredAnoxiaIronPartial PressureOxygen ConsumptionFerritinsBlood Gas AnalysisOxygen Inhalation TherapyBlood Gas Monitoring, TranscutaneousHemochromatosisAltitudeCarbon DioxideDivingHydrogen-Ion ConcentrationTime FactorsBileRespiration