1. Fundación para la Conservación del Quebrantahuesos (FCQ), Plaza San Pedro Nolasco 1, 4-F, 50001 Zaragoza, Spain.
2. Departament of Microbiology and Ecology, Faculty of Biological Sciences, University of Valencia, E-46100 Burjassot, Valencia, Spain.
3. Cavanilles Institute of Biodiversity and Evolutionary Biology, Terrestrial Vertebrates Group, University of Valencia, C/ Catedrático José Beltrán 2, E-46980 Paterna, Valencia, Spain.