1. Apffel, C. A., 1976, Nonimmunological host defenses: A review, Cancer Research 36: 1527–1537.
2. Ames, B. W., Durston, W. E., Yamasaki, E., and Lee, F. D., 1973, Carcinogens are mutagens: A simple test system combining liver homogenates for activation and bacteria for detection, Proc. Natl. Acad. Sci. USA 70: 2281–2285.
3. Beavo, J. A., Rogers, N. L., Crofford, O. B., Hardman, J. G., Sutherland, E. W., and Newman, E. V., 1970, Effects of xanthine derivatives on lipolysis and adenosine 3′,5′-monophosphate phosphodiesterase activity, J. Mol. Pharmacol. 6:597–603.
4. Belman, S., and Troll, W., 1972, The inhibition of croton oil-promoted mouse skin tumorigenesis by steroid hormones, Cancer Res. 32:450–454.
5. Benditt, E. P., 1977, The origin of atherosclerosis, Sci. Amer. 236:74–85.