Proceedings of the National Academy of Sciences (2012) - Comments
pubmed: 23091016  doi: 10.1073/pnas.1204994109  issn: 1091-6490  issn: 0027-8424 

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Tija C. Jacob, Guido Michels, Liliya Silayeva, Julia Haydon, Francesca Succol, Stephen J. Moss