Area and size of liver tumorsa.

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.