Proceedings of the National Academy of Sciences of the United States of America (2006) - Comments
pubmed: 16611728  doi: 10.1073/pnas.0600345103  issn: 0027-8424  issn: 1091-6490 

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Robert P. Ryan, Yvonne Fouhy, Jean F. Lucey, Lisa C. Crossman, Stephen Spiro, Ya-Wen He, Lian-Hui Zhang, Stephan Heeb, Miguel Camara, Paul Williams, J. Maxwell Dow