TABLE 1.

Closed intestinal loop weights 3 days p. i. in milligrams per centimeter

Characteristic	Buffer	RRV	Buffer	RRV
opn genotype	+/+	+/+	−/−	−/−
No. of animals	8	8	11	13
Mean	14.4	16.5	17.3	21.7
Minimum	9.4	13.8	14.6	14.6
Maximum	17.8	19.2	18.7	31.8
SD	3.18	1.75	1.36	4.63