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Diagrams of the true and the sham moxibustion devices. The true and the sham moxibustion devices appear to be identical. (A) The true moxibustion has holes at the bottom to allow heat and smoke to radiate to the acupoints. (B) The sham moxibustion has polystyrene (Styrofoam) insulation at its base to block heat and smoke from getting to the acupoint.
