1. First Department of Internal Medicine, Laiko General Hospital Medical School of National and Kapodistrian University of Athens Athens Greece
2. Pulmonology Department, Laiko General Hospital, Medical School National and Kapodistrian University of Athens Athens Greece
3. Infectious Diseases and COVID‐19 Unit, Laiko General Hospital Medical School of National and Kapodistrian University of Athens Athens Greece
4. Pathophysiology Department, Medical School National and Kapodistrian University of Athens, and General Hospital of Athens Laiko Athens Greece