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Dr. Choh Hao Li,  biochemist and leading researcher in the functions of the pituitary gland, at the University of California Medical Center, San Francisco, 1976. Dr. Li holds a molecular model of a natural opiate, beta-endorphin. Photo by John G. Zimmerman
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Dr. Choh Hao Li, biochemist and leading researcher in the functions of the pituitary gland, at the University of California Medical Center, San Francisco, 1976. Dr. Li holds a molecular model of a natural opiate, beta-endorphin. Photo by John G. Zimmerman