Urinary and fecal iron excretion (μg/kg) induced by the sc administration of HBED monosodium salt, 75 μmol/kg for three doses (225 μmol/kg total). Drug was administered on days 0, 2, and 4. Note the prompt return to baseline levels within 24 hours of each dose; baseline iron levels in the urine and stool have not been subtracted.