1. Department of Infectious Diseases and COVID‑19 Unit, Laiko General Hospital, Medical School, 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. Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece
4. Department of Neurosurgery, Nicosia General Hospital, 2029 Nicosia, Cyprus
5. Department of Neurosurgery, General University Hospital of Larisa, 41221 Larisa, Greece