** FILE ** In this April 16, 2014, photo, Yoshiki Sasai, deputy chief of the RIKEN Center for Developmental Biology, speaks during a press conference in Tokyo. Police said Sasai, 52, was found Tuesday, Aug. 5, 2014, at a government science institute RIKEN in Kobe, western Japan. Sasai had supervised and co-authored stem-cell research papers that had to be retracted due to falsified contents. (AP Photo/Kyodo News)
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