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. 2018 Jan 11;19:28. doi: 10.1186/s13063-017-2339-z

Fig. 2.

Fig. 2

Acupuncture needle point. The black arrow shows the Die-e acupoint, which is located under the zygomatic arch between the coronoid process and the mandibular condyle. Acupuncture on the Die-e point at a needling depth of 50 mm and 20 mm in the real acupuncture group and in the sham acupuncture group, respectively