Table 1.

Incidence of Spontaneous Colitis in Rorc^gfp/+Ahr^−/− Mice

	Rorcgfp/+AhrCtrl		Rorcgfp/+Ahr−/−
	Total No. of Mice	No. of Colitic Mice	Total No. of Mice	No. of Colitic Mice
Litter 1	2	0	2	1
Litter 2	2	0	2	2
Litter 3	1	0	1	0
Litter 4	2	0	2	0
Litter 5	3	0	3	0
Litter 6	2	0	3	3
Litter 7	3	0	4	0
Litter 8	2	0	2	2

16-week-old Rorc^gfp/+Ahr^−/− and littermate Rorc^gfp/+Ahr^Ctrl (Rorc^gfp/+Ahr^+/− or Rorc^gfp/+Ahr^+/+) mice were monitored for colitis development. Eight independent litters of mice are shown. Colitis was determined by macroscopic appearance of the colon (i.e., thickening and fibrosis of the intestinal tissues) and histology.