Stem cell research paper questioned

KOFU, Japan - University of Yamanashi professor Teruhiko Wakayama meets reporters in Kofu, Yamanashi Prefecture, on March 10, 2014. Wakayama has told his co-authors that their research paper on what appeared to be a groundbreaking method for producing stem cells should be retracted and resubmitted. Questions have been raised about irregular images contained in the paper, written by a group led by Haruko Obotaka at the Center for Developmental Biology of the government-affiliated Riken institute, on a method it named "stimulus-triggered acquisition of pluripotency" or STAP.

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