Abstract
VARIOUS nitrosamines and nitrosamides are now frequently used as carcinogens1–3. Investigations so far have involved oral, intravenous or subcutaneous application. We have examined the carcinogenic action of some of these substances by painting them on to the skin.
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GRAFFI, A., HOFFMANN, F. & SCHÜTT, M. N-Methyl-N-Nitrosourea as a Strong Topical Carcinogen when painted on Skin of Rodents. Nature 214, 611 (1967). https://doi.org/10.1038/214611a0
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DOI: https://doi.org/10.1038/214611a0
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