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Changes in pain-associated disability (NDI:Neck Disability Index). ○: control group. ■: local acupuncture point (LP) group. □: distal acupuncture point (DP) group. Values are presented as mean. SD represented with error bars in the LP and the DP groups. * significantly different from pre-treatment in the DP group (P < .05). ** significantly different from pre-treatment in the LP group (p < .01). † significantly different from control group in the DP group (P < .05).
