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Omae, K., Sakurai, H., Higashi, T. et al. Reevaluation of urinary excretion of coproporphyrins in lead-exposed workers. Int. Arch Occup Environ Heath 60, 107–110 (1988). https://doi.org/10.1007/BF00381489
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DOI: https://doi.org/10.1007/BF00381489