Erratum to: Biol Res 42: 57–68, 2009 DOI 10.4067/S0716-97602009000100006
Unfortunately, the original version of this article [1] contained an error. The name of one of the authors, Eloísa Ferreira, was not included in the author list.
The correct author list and the new “Authors’ contributions” section have been correctly included in this erratum.