we now include new citations in relationship to different problems: Butlin et al. (2009), Cohan (2011), Cohan (2013), Cohan & Aracena (2012), Diekmann et al. (2004), Nosil (2012), Vos (2011), Wiedenbeck & Cohan (2011).
We hope that now both reviewers, and all other potential readers, will not be misled by our approach.