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Duke University ignored a graduate student's warnings about possible misconduct in the lab of a cancer researcher, years before the case exploded into public view, The Cancer Letter reported. The newsletter published documents showing that a medical student, Bradford Perez, tried to inform campus administrators about statistical anomalies in studies produced in the lab of Anil Potti, a cancer researcher. But university officials discouraged Perez from filing a formal complaint, the newsletter reported. Potti ultimately was found to have misrepresented his credentials and Duke was sued by participants in clinical trials that the university suspended amid the controversy.