1. Department of Infectious Diseases‑COVID‑19 Unit, Laiko General Hospital, 11527 Athens, Greece
2. Pulmonology Department, Laiko General Hospital, 11527 Athens, Greece
3. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
4. Renal Transplantation Unit, Laiko General Hospital, 11527 Athens, Greece
5. Unit of Endocrinology, First Department of Internal Medicine, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
6. Department of Gastroenterology, Laiko General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
7. Department of Neurosurgery, General University Hospital of Larisa, 41221 Larisa, Greece
8. 1st Pulmonology Department, Sismanogleio Hospital, 15126 Athens, Greece