Organ harvesting from Falun Gong practitioners in China must be taken from a living donor (kidneys must be transplanted within 24–48 hours; livers within 12 hours, and hearts within 8 hours). Kirk C. Allison, Associate Director of the Program in Human Rights and Medicine at the University of Minnesota, wrote that the "short time frame of an on-demand system [as in China] requires a large pool of donors pre-typed for blood group and HLA matching," which is consistent with reports of Falun Gong prisoners having blood and tissue tested in custody. He wrote that China's short organ wait times could not be assured on a “random death” basis,
Water organ by the Greeks, the hydraulis continued to be used through antiquity in the Roman world. In the Middle Ages, Eastern Roman (Byzantine) and Muslim inventors developed, among other pieces, an automatic hydraulic organ (described by the Banu Musa in their 9th-century treatise "Book of Ingenious Devices"), a 'musical tree' at the palace of Khalif al-Muqtadir (ruled 908–32), and a long-distance hydraulic organ that could be heard from sixty miles away (described in the Arabic "Sirr al-asrar" and later translated into Latin by Roger Bacon). By the end of the 13th century hydraulic automata had reached Italy and the rest of