MINNEAPOLIS (AP) âÄî The University of Minnesota is once again investigating allegations of manipulated data in a study from its Stem Cell Institute. The University says it started the inquiry in mid-July after being told about the allegations by New Scientist magazine in April. New Scientist reports in its current edition that after examining the work of Jizhen Lin it found possible manipulation of images in seven papers published between 2001 and 2008. New Scientist focused on an 2008 paper. Lin told the Star Tribune that he denies trying to falsify data in it and says he used accepted methods to illustrate an experiment. This is the third time reports in the magazine have prompted internal investigations of research at the Stem Cell Institute. So far, at least two papers have been corrected and one has been retracted. ___ On the Net: University of Minnesota, Stem Cell Institute: http://www.stemcell.umn.edu/ New Scientist magazine: http://www.newscientist.com/