There is an error in the PDF version of the published article. In the Material and Methods, under the subsection Experimental design and statistical analysis, the text should indicate the following:The Publisher apologizes for the error.
Authors: Pablo Salgado; José A Vázquez; Pilar Riobó; José M Franco; Rosa I Figueroa; Anke Kremp; Isabel Bravo Journal: PLoS One Date: 2015-12-04 Impact factor: 3.240