1. Department of Neurosurgery, Hospital Universitario de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain;
2. Department of Neurosurgery, Hôpital Gui de Chauliac, Montpellier University Medical Center;
3. Department of Neurosciences, Division of Neurosurgery, Bambino Gesù Children Hospital, Roma and
4. Department of Biotechnology and Life Sciences, Neurosurgical Unit, Università dell'Insubria, Varese, Italy; and
5. Department of Neurosurgery, Nara Medical University, Kashihara, Nara, Japan
6. INSERM U1051, Team “Plasticity of the central nervous system, human stem cells, and glial tumors,” Institute for Neurosciences of Montpellier, Hôpital Saint Eloi, Montpellier, France;