Table 1: Layer thickness related to duration of obstruction (μm).

GroupsMucosaSubmucosaCircumferential muscleLongitudinal muscle

Normal
Sham-obstructed
Obstructed for 2 days
Obstructed for 4 days * *
Obstructed for 7 days * * *
Obstructed for 14 days ** ** **

* ; ** (compared with normal and sham-obstructed groups).