TOKYO — A Japanese government-funded laboratory said Tuesday it is considering retracting a research paper describing a simple way of turning ordinary cells from mice into stem cells. The RIKEN Center for Development Biology in Kobe, Japan, has been looking into questions raised over images and wording in the paper, co-authored by lab scientist Haruko Obokata. RIKEN said Tuesday that it may retract the paper because of credibility and ethics issues, even though an investigation is continuing.
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