Science (2004) - Comment
pubmed: 15286374  doi: 10.1126/science.1100195  issn: 1095-9203  issn: 0036-8075 

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Giuseppe Legname, Ilia V. Baskakov, Hoang-Oanh B. Nguyen, Detlev Riesner, Fred E. Cohen, Stephen J. DeArmond, Stanley B. Prusiner