Authors
Milan N. Mladenovski
Department of Neurology and Neurosurgery, Medical University – Pleven, Bulgaria
Nikolay V. Vasilev
Department of Neurology and Neurosurgery, Medical University – Pleven, Bulgaria
Mladen E. Ovcharov
Department of Neurology and Neurosurgery, Medical University – Pleven, Bulgaria
Iliya V. Valkov
Department of Neurology and Neurosurgery, Medical University – Pleven, Bulgaria