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. 2011 Sep 20;6(9):e25272. doi: 10.1371/journal.pone.0025272

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Matsunaga et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Developmental changes of song motif similarity of GFP-virus or Cad7GFP-virus injected bird's song to tutor's song. There is a significant difference between Cad7GFP- and GFP-virus injected birds by P80. The difference is maintained at P120. Data are shown as the mean ± SEM. Differences were tested using the Mann-Whitney U-test, *p<0.05.