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In page Forced organ harvesting from Falun Gong practitioners in China:

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In addition to the organ transplants in Jinzhou, Gutmann wrote that security agencies in Dalian supplied human cadavers to two major plastination factories, where the bodies were plastinated and displayed internationally. According to an informant interviewed on the program 20/20, the cadavers came from executed prisoners.[citation needed] Gutmann again noted a numerical disparity: the plastination factories in Dalian processed thousands of cadavers, far more than could plausibly have been sourced from voluntary donations or legally executed prisoners. The establishment of these factories coincided with the onset of the persecution of Falun Gong.[2]