© 1985 Oxford University Press
correction |
ERRATUM
ABSTRACTVolume 5, Number 3 (1985), in the article, "History, Survival, and Growth Patterns of B6C3F1 Mice and F344 Rats in the National Cancer Institute Carcinogenesis Testing Program," by Thomas P. Cameron, Robert L. Hickman, Mary R. Kornreich, and Robert T. Tarone, pages 526–538: It has been brought to our attention that in compiling survival rates of the B6C3F1 mouse for the earliest years (1971–1973) for subject article, rates for 90-week studies were inadvertently included. This was the result of a misinterpretation of a computer program that enabled us to identify and censor out 72-week studies completed in the bioassay program but not 90-week studies. Elimination of the rates for the 90-week studies decreases the survival rates for those 3 years down to approximately the level we experienced for the succeeding 5 years. Moreover, revised data indicate that 2-year survival rates for the NCI Bioassay Program during this time period were virtually identical to those being achieved currently by the NTP, as reported by Haseman et al. (J. Nail. Cancer Inst. 75, 975–984). Thus, our stated concern for the apparent decrease in survival rates for the later years, after the imposition of improved methodology in animal production and general husbandry, was without foundation.