Proceedings of the National Academy of Sciences (2009) - Comments
pubmed: 19196994  doi: 10.1073/pnas.0811083106  issn: 1091-6490  issn: 0027-8424 

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Guofa Liu, Weiquan Li, Lei Wang, Amar Kar, Kun-Liang Guan, Yi Rao, Jane Y. Wu