1. Department of Physiology and Pathophysiology, Medical University, 1413 Sofia, Bulgaria
2. Genetic Medico‑Diagnostic Laboratory ‘Genica’, 1612 Sofia, Bulgaria
3. Laboratory of Clinical Virology, Medical School, University of Crete, Heraklion 71003, Greece
4. Biomedical Applications Unit, Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece