1. Department of Neurosurgery, Faculty of Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria.
2. Department of Neurosurgery, Hospital de San José – Sociedad de Cirugía de Bogotá, Fundación Universitaria de Ciencias de la Salud, Bogotá D.C., Colombia.
3. Department of Psychiatry, NYU Grossman School of Medicine, New York, NY, USA.
4. Department of Diagnostic Imaging, Medical University of Sofia, Sofia, Bulgaria.
5. Research Complex for Translational Neuroscience, Medical University of Plovdiv, Plovdiv, Bulgaria.