Correction: sharp bounds and normalization of Wiener-type indices.

[This corrects the article DOI: 10.1371/journal.pone.0078448.].

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This article was republished on March 18, 2014, to include the “Text_S1” file in the supporting information. Please download this article again to view the correct version. The originally published, uncorrected article and the republished, corrected article are provided here for reference.

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