Figure 1

Histological slides showing examples of N-methyl-N-nitrosourea induced mammary tumors in Sprague–Dawley rats fed the control diet (hematoxylin and eosin). Original magnifications: (a) 100× and (b) 200×.
Histological slides showing examples of N-methyl-N-nitrosourea induced mammary tumors in Sprague–Dawley rats fed the control diet (hematoxylin and eosin). Original magnifications: (a) 100× and (b) 200×.