1. Department of Neurosurgery; Postgraduate Medical Center, Bródno Mazovia Hospital; Warsaw Poland
2. Department of Children's Neurology and Epileptology; The Institute of Children's Health; Warsaw Poland
3. Department of Neurology; Medical University of Gdansk and St. Adalbert Hospital; Gdansk Poland
4. Department of Neurosurgery; Bródno Mazovia Hospital; Warsaw Poland