Proceedings of the National Academy of Sciences (2007) - Comment
pubmed: 17517660  doi: 10.1073/pnas.0702975104  issn: 0027-8424  issn: 1091-6490 

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João B. Oliveira, Nicolas Bidère, Julie E. Niemela, Lixin Zheng, Keiko Sakai, Cynthia P. Nix, Robert L. Danner, Jennifer Barb, Peter J. Munson, Jennifer M. Puck, Janet Dale, Stephen E. Straus, Thomas A. Fleisher, Michael J. Lenardo