highly significantP < 0.001
There was a highly significant reduction (P < 0.001 and P < 0.01, respectively) in writhing in the morphine and aspirin groups compared to the control group, as shown in Figure 1 . 4.2.
There was a highly significant reduction (P < 0.001 and P < 0.01, respectively) in writhing in the morphine and aspirin groups compared to the control group, as shown in Figure 1 . 4.2.