1. Medical School, University of Ioannina, 45500 Ioannina, Greece
2. Department of Infectious Diseases and COVID‑19 Unit, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
3. Unit of Endocrinology, First Department of Internal Medicine, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
4. Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece
5. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003, Heraklion, Greece
6. Department of Neurosurgery, General University Hospital of Larisa, 41221 Larisa, Greece