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Biocapture of biomolecules from the skin surface over the Bladder meridian (BL) of the leg. The BL meridian and related acupuncture points are illustrated right panel. The region over Chengshan (BL57) is defined as meridian with an acupoint. the space between Heyang (BL55) and Chengjin (BL56) is part of the BL meridian without an acupoint, and a non-meridian control was established over region adjacent to the BL line.
