Table 1. Experimental groups.

Group	Ischemic period (h)				Reperfusion (2 h)	n
	4	6	8	9
Control	-	-	-	-	-	6
4I	+				-	6
6I		+			-	6
8I			+		-	6
9I				+	-	6
8IR			+		+	6
9IR				+	+	6

I: ischemia, IR: ischemia followed by reperfusion.