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Four thermal images from a 23-year-old healthy male volunteer before (a), during (b) and (c), and after (d) violet laser stimulation at the acupoint Dazhui (GV.14). Note the significant (P < 0.05) increase at the shoulder and also the increase in skin temperature at the “far field” location around the Zhiyang (GV.9) area of the same meridian. Modified from [19].
