“…BLLs were not measured in that landmark study, and the diagnosis of lead poisoning was made by measuring increased coproporphyrin in urine (over 500 µg/L). Heightened osmotic fragility and changes in erythrocyte shapes have long been thought to be responsible for the enhanced erythrocyte destruction; indeed, in experimental animals, removal of the spleen, the organ responsible for erythrocyte sequestration, temporarily reverses the anemia of lead poisoning (Aub et al 1925).…”