PLoS ONE PLoS ONE plos plosone PLoS ONE 1932-6203 Public Library of Science San Francisco, USA 3556117 10.1371/annotation/89b74b56-3f48-4ee2-9da1-699b3fdea564 Correction Correction: Testosterone Affects Song Modulation during Simulated Territorial Intrusions in Male Black Redstarts (Phoenicurus ochruros) Correction Apfelbeck Beate Kiefer Sarah Mortega Kim G. Goymann Wolfgang Kipper Silke 2012 28 12 2012 7 12 10.1371/annotation/89b74b56-3f48-4ee2-9da1-699b3fdea564 2012 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 credited. Testosterone Affects Song Modulation during Simulated Territorial Intrusions in Male Black Redstarts (Phoenicurus ochruros)

No competing interests declared.

There was an error in the Competing Interests statement. The correct Competing Interests statement is as follows: I have read the journal's policy and have the following competing interests: Novartis provided us with the aromatase inhibitor “letrozole” for our experiments. This does not alter our adherence to all the PLOS ONE policies on sharing data and materials.