1. Universidad Peruana Cayetano Heredia, Lima, Peru
2. Vascular Neurosurgery and Skull Base Division, Department of Neurosurgery, Hospital Nacional Dos de Mayo, Lima, Peru
3. Sociedad Científica de San Fernando, Universidad Nacional Mayor de San Marcos, Lima, Peru
4. Facultad de Medicina Humana, Universidad Nacional San Luis Gonzaga, Ica, Peru
5. Universidad Mayor Real y Pontificia de San Francisco Xavier de Chuquisaca, Bolivia
6. School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
7. Mansoura Manchester Program, Faculty of Medicine, Mansoura University, Mansoura, Egypt
8. Department of Neurosurgery, Loma Linda University Medical Center, Loma Linda, California, United States