1. Doctoral School, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania
2. Department of Physiology, School of Medicine, Istanbul Medipol University, Istanbul 34214, Turkey
3. Department of Biomedical Sciences, New York Institute of Technology, College of Osteopathic Medicine, Old Westbury, NY 115680-8000, USA
4. Department of Neurology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
5. Department of Neurology, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania