1. Institute of Evolutionary Biology (UPF-CSIC); PRBB, Dr. Aiguader 88 08003 Barcelona Spain
2. Catalan Institution of Research and Advanced Studies (ICREA); Passeig de Lluís Companys, 23 08010 Barcelona Spain
3. CNAG-CRG; Centre for Genomic Regulation (CRG); Barcelona Institute of Science and Technology (BIST); Baldiri i Reixac 4 08028 Barcelona Spain
4. Copenhagen Zoo; Roskildevej 38 2000 Frederiksberg Denmark