1. Cameron, R., Imaida, K., Ito, N.: Promotive effects of ethinyl estradiol in hepatocarcinogenesis initiated by diethylnitrosamine in male rats. Gann, 72: 339-340, 1981.

2. Hirose, M., Shibata, M., Hagiwara, A., Imaida, K., Ito, N.: Chronic toxicity of butylated hydroxytoluene in Wistar rats. Fd Cosmet Toxicol, 19: 147-151, 1981.

3. Tatematsu, M., Imaida, K., Ito, N., Togari, H., Suzuki, Y., Ogiu, T.: Sandhoff disease. Acta Pathol Jpn, 31: 503-512, 1981.

4. Tatematsu, M., Imaida, K., Fukushima, S., Arai, M., Mizutani, M., Ito, N.: Cytopathological effect of partial cystectomy of rats. Acta Pathol Jpn, 31: 535-543, 1981.

5. Ito, N., Hirose, M., Shirai, T., Tsuda, H., Nakanishi, K., Fukushima, S.: Lesions of the urinary bladder epithelium in 125 autopsy cases. Acta Pathol Jpn, 31: 545-557, 1981.

6. Cameron, R., Imaida, K., Ito, N.: Promotive effects of deoxycholic acid on hepatocarcinogenesis initiated by diethylnitrosamine in male rats. Gann, 72: 635-636, 1981.

7. Takahashi, M., Shirai, T., Fukushima, S., Ito, N., Kokubo, T., Furukawa, F., Kurata, Y.: Ulcer formation and associated tumor production in multiple sites within the stomach and duodenum of rats treated with N-methyl-N’-nitro-N-nitrosoguanidine. J Natl Cancer Inst, 67: 473-479, 1981.

8. Hirose, M., Imaida, K., Ito, H., Hayashi, M., Ishihara, Y., Ito, N.: Effects of chloroform and dimethylnitrosamine on renal carcinogenesis in unilaterally nephrectomized rats fed formic acid 2-[4-(5-nitro-2-furyl)-2-thiazolyl]hydrazide. Carcinogenesis, 2: 703-708, 1981.

9. Tamano, S., Tsuda, H., Tatematsu, M., Hasegawa, R., Imaida, K., Ito, N.: Induction of γ-glutamyl transpeptidase positive foci in rat liver by pyrolysis products of amino acids. Gann, 72: 747-753, 1981.

10. Fukushima, S., Ishihara, Y., Nishio, O., Ogiso, T., Shirai, T., Ito, N.: Carcinogenicities of quinoline derivatives in F344 rats. Cancer Lett, 14: 115-123, 1981.

11. Suganuma, T., Katsuyama, T., Tsukahara, M., Tatematsu, M., Sakakura, Y., Murata, F.: Comparative histochemical study of alimentary tracts with special reference to the mucous neck cells of the stomach. Am J Anatomy, 161: 219-238, 1981.

12. Fukushima, S., Hirose, M., Hagiwara, A., Hasegawa, R., Ito, N.: Inhibitory effect of 4,4’-diaminodiphenylmethane on liver, kidney and bladder carcinogenesis in rats ingesting N-ethyl-N-hydroxyethylnitrosamine or N-butyl-N-(4-hydroxybutyl)nitrosamine. Carcinogenesis, 2: 1033-1037, 1981.

13. Sato, K., Hatayama, I., Hoshino, K., Imai, F., Tsuchida, S., Sato, T., Nishimura, K., Tatematsu, M., Ito, N.: Enzyme deviation patterns in primary rat hepatomas induced by sequential administration of two chemically different carcinogens. Cancer Res, 41: 4147-4153, 1981.

14. Imaida, K., Shirai, T., Tatematsu, M., Takano, T., Ito, N.: Dose responses of five hepatocarcinogens for the initiation of rat hepatocarcinogenesis. Cancer Lett, 14: 279-283, 1981.

15. Hirose, M., Shirai, T., Tsuda, H., Fukushima, S., Ogiso, T., Ito, N.: Effect of phenobarbital, polychlorinated biphenyl and sodium saccharin on hepatic and renal carcinogenesis in unilaterally nephrectomized rats given N-ethyl-N-hydroxyethylnitrosamine orally. Carcinogenesis, 2: 1299-1302, 1981.

16. Ito, N.: In vivo carcinogenesis of 4-nitroquinoline 1-oxide and related compounds. In: Sugimura, T. (ed.) Carcinogenesis, Vol. 6, pp117-153. Raven Press, New York, 1981.