Proceedings of the National Academy of Sciences (2013) - Comment
pubmed: 23818606  doi: 10.1073/pnas.1302418110  issn: 1091-6490  issn: 0027-8424 

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Jung-Hoon Lee, Lina Yi, Jixi Li, Katrin Schweitzer, Marc Borgmann, Michael Naumann, Hao Wu