Effects of in vivo modulation of splenic natural killer cell activity on the growth of spleen-seeking tumour variants.

and the rate of tumour growth was assessed by the number of specific PFC in the spleen after 14 days (BSp) or 17 days (HeSp) as previously described, (Ezaki & Marbrook, 1985). Test for statistical significance The probability that the difference between two experimental groups was not due to chance variation was estimated by using the two sample t-test (Huntsberger & Leaverton, 1970). P values are shown and those smaller than 0.05 were considered to be statistically significant, and smaller than 0.01 as highly significant.

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