1. Departament de Biologia Animal, Universitat de Barcelona, Spain.
2. Department of Molecular Biochemistry, Medical Faculty, University of Leipzig, Leipzig, Germany.
3. Department of Animal Biology and Genetics, Laboratory of Anthropology, University of Florence, Italy.
4. Unitat de Biologia Evolutiva, Universitat Pompeu Fabra, Barcelona, Spain.
5. Dipartimento di Scienze Ambientali, Università di Siena, Siena, Italy.