Area and size of liver tumors^a.

aTumor number (see Table 3), size, and area were assessed at necropsy and compared using least square means procedures (see text). Tumor numbers are shown as raw means ± standard deviations. The sizes of approximately 15% of tumors were not measured, including all tumors for Group 4. bTumor area and size are shown as geometric means ± standard deviations. cNA, no size measure for tumors available.