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Verso: WHO/18313. WPRO. Acupuncture. SM 12.1979. A centuries-old drawing in a Shanghai museum shows medical students are trying their skills on a larger-than-life model. The correct "point" was plugged with wax and the model was filled with water; if the student pierced the right spot, he was rewarded by a tiny fountian.
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World Health Organization; World Health Organization website