Proceedings of the National Academy of Sciences (2004) - Comment
pubmed: 15007175  doi: 10.1073/pnas.0400131101  issn: 0027-8424  issn: 1091-6490 

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Nicolas Genoud, Axel Behrens, Gino Miele, Dimitri Robay, Frank L. Heppner, Stefan Freigang, Adriano Aguzzi