Proceedings of the National Academy of Sciences of the United States of America (2004) - Comment
doi: 10.1073/pnas.0404772101  issn: 0027-8424  issn: 1091-6490  pubmed: 15292505 

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Magdalini Polymenidou, Frank L. Heppner, Erica C. Pellicioli, Eduard Urich, Gino Miele, Nathalie Braun, Franziska Wopfner, Hermann M. Schatzl, Burkhard Becher, Adriano Aguzzi