1. First Department of Propedeutic and Internal Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. First Department of Internal Medicine, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
3. Hemοglobinopathies Reference Center, Laiko General Hospital, 11527 Athens, Greece
4. Department of Infectious Diseases‑COVID‑19 Unit, Laiko General Hospital, 11527 Athens, Greece
5. Renal Transplantation Unit, Laiko General Hospital, 11527 Athens, Greece
6. Unit of Endocrinology, First Department of Internal Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
7. Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece
8. Department of Cytology, Mitera Hospital, 15123 Athens, Greece
9. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
10. Department of Infectious Diseases‑COVID‑19 Unit