1. Department of Neurology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland;
2. Department of Neurology, Pomeranian Medical University, Szczecin, Poland;
3. Department of Biochemistry, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland