1. Aldaz CM, Conti CJ, Klein-Szanto AJP, Slaga TJ (1987) Progressive dysplasia and aneuploidy are hallmarks of mouse skin papillomas: relevance to malignancy. Proc Natl Acad Sci USA 84: 2029–2032.
2. Aldridge WN (1986) The biological basis and measurement of thresholds. Annu Rev Pharmacol Toxicol 26: 39–58.
3. Baylin SB, Höppener JWM, de Bustros A, Steenbergh PH, Lips CJM, Nelkin BD (1986) DNA methylation patterns of the calcitonin gene in human lung cancers and lymphomas. Cancer Res 46: 2917–2922.
4. Becker RA, Shank RC (1985) Kinetics of formation and persistence of ethylguanines in DNA of rats and hamsters treated with diethylnitrosamine. Cancer Res 45: 2076–2084.
5. Bedell MA, Lewis JG, Billings KC, Swenberg JA (1982) Cell specificity in hepatocar- cinogenesis: preferential accumulation of 06-methylguanine in target cell DNA during continuous exposure of rats to 1,2-dimethylhydrazine. Cancer Res 42: 3079–3083.