1. How sick a patient?
2. NIH/NCI, Guidelines for Carcinogen Bioassay in Small Rodents. Tech. Rep. Ser. No. 1, NCI-CG-TR-1. (1976).
3. US FDA Bureau of Foods, Toxicological Principles for the Safety Assessment of Direct Food Additives and Color Additives Used in Food, NT IS PB 83-170696. US Department of Commerce, National Technical Information Service, Springfield, VA (1982).
4. US EPA, Pesticide Assessment Guidelines, Subdivision F. Hazard Evaluation, Human & Domestic Animals, revised edition, NTIS Nov. 84. PB86-108958. National Technical Information Service, Springfield, VA (1984).
5. International Agency for Research on Cancer, Long-term and Short-term Assays fro Carcinogens: A Critical Appraisal, IARC Scientific Publications No. 83. IARC, Lyon (1986).