1. Molecular Neuro-oncogenetics Laboratory; Research Unit, Hospital Universitario La Paz; IdiPAZ Madrid Spain
2. Department of Otolaryngology; Hospital Universitario La Paz; IdiPAZ Madrid Spain
3. Neurosurgery Department; Fundacion Jimenez Diaz; Madrid Spain
4. Neurosurgery Department; Hospital Universitario La Paz; IdiPAZ Madrid Spain
5. Genetics and Molecular Biology Laboratory; Federal University of Piau; Parnaiba Brazil
6. Human Cytogenetics Laboratory; Institute of Biological Sciences, Federal University of Para; Belem Brazil
7. Molecular Pathology Research Unit; Virgen de la Salud Hospital; Toledo Spain
8. Department of Biochemistry and Genetics; University of Navarra School of Sciences; Pamplona Spain