1. Department of Infectious Diseases and COVID‑19 Unit, Laiko General Hospital, Medical School, 11527 Athens, Greece
2. Department of Pathophysiology, Laiko General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
3. 1st Department of Neurology, Eginition Hospital, National and Kapodistrian University of Athens, 11528 Athens, Greece
4. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
5. Department of Pulmonology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece