Summary
Focal proliferations of adventitial cells of small blood vessels in the rat brain were found within 6 weeks after i.p. injection of methyl-nitroso-urea. The results of electron microscopic examination suggest the preneoplastic nature of the changes.
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Lageman, A., Dietz, W. Zur Feinstruktur früher Veränderungen an Rattenhirngewebe nach Injektion von Methylnitrosoharnstoff. Experientia 28, 1344–1345 (1972). https://doi.org/10.1007/BF01965335
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DOI: https://doi.org/10.1007/BF01965335