Table 1.

Comparison of findings of crypt damage

Disappearance of ring-shaped fluorescent stains	Disappearance of normal crypts
	not observed	observed
		in < 1/3 area	in 1/3-2/3 area	in > 2/3 area
not observed	XXX
in < 1/3 area		XX
in 1/3-2/3 area		XX	XX
in > 2/3 area			X	XXXX

Every X stands for one experiment performed. p = 0.0007 (Spearman's rank test).