1. Doctoral School of Medicine , Ovidius University of Constanta , Romania
2. Department of Neurology , Military Emercency Hospital of Constanta , Romania
3. Faculty of Dentistry, Department of Biostatistics and Biophysics , Ovidius University of Constanta , Romania
4. Clinical Infectious Diseases Hospital of Constanta , Romania
5. Romanian Academy of Medical Sciences
6. Academy of Romanian Scientists