Stem cell investigator resigns in wake of controversy

Stem cell investigator Haruko Obokata has resigned from Japan's RIKEN Center for Developmental Biology some months after a paper she co-authored on a new method to create pluripotent stem cells was retracted. Her resignation letter came along with the results of a probe into the work, which failed to confirm her study. Yoshiki Sasai, another co-author, took his own life after the work came under suspicion, according to a report in Scientific American. Report

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