1. Department of Neurosurgery, Russian People’s Friendship University, 117198 Moscow, Russia
2. Department of Head and Neck, Unidad de Neurociencias, Instituto Nacional de Cancerología, Mexico City 14080, Mexico
3. School of Medicine, University of Central Lancashire, Preston PR0 2AA, UK
4. Department of Human Anatomy and Histology, Sechenov University, 119911 Moscow, Russia
5. Department of Neurosurgery, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
6. Department of Neurosurgery, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10178 Berlin, Germany
7. Department of Neurosurgery, Hospital Angeles Universidad, Mexico City 03330, Mexico
8. Department Neurosurgery, Clinique Ngaliema, Kinshasa 3089, Democratic Republic of the Congo
9. Department of Medicine and Surgery, Neurosurgery, University of Milano-Bicocca, 20126 Milan, Italy
10. Department of Neurosurgery, Liaquat National Hospital and Medical College, Karachi 05444, Pakistan
11. Department of Pathology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago 8330024, Chile
12. Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana (AOUP), 56100 Pisa, Italy