Table 2. Postoperative BrdU labeling indexes in the 3 groups.

Group (n  =  5)	Day 2	Day 7	Day 14	Day 28
The PH group	126±19†	68±11†	53±12†	23±10†
The PVA group	133±21†	87±13*†	76±11*†	39±9*†
The control group	41±9	32±8	25±9	19±6

Data were expressed as mean±SD. *P < 0.05 versus the PH group, ^†P < 0.01 versus the control group.