Pain responses in the formalin test when acupuncture began 5 min after pain induction. Responses according to phase were presented in (A) and total response was presented in (B). Sequential pain response was presented in (C). All data are presented as mean ± SE. The black bar labeled "Acupuncture" indicates the 5 minute time interval during which the 3 minute treatment occurred for all mice. **p < 0.01 and ***p < 0.001 when compared to control group, #p < 0.05 when compared to LR2 group.