1. National Hellenic Research Foundation, 11635 Athens, Greece
2. Department of Surgical Pathology, Saint Savvas Anticancer Hospital of Athens, 11522 Athens, Greece
3. Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Greece
4. Department of Internal Medicine and Infectious Diseases, University Hospital of Heraklion, 71110 Heraklion, Greece
5. Nasco AD Biotechnology Laboratory, 18536 Pireus, Greece