1. Pulmonology Department, Laiko General Hospital, Athens 11527, Greece
2. Oncology Department, Athens Medical Group, Athens 15125, Greece
3. Renal Transplantation Unit, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
4. Department of Pathology, Athens Medical Group, Athens 15125, Greece
5. First Department of Propedeutic Internal Medicine, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
6. N.S. Christeas Laboratory of Experimental Surgery and Surgical Research, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
7. First Department of Internal Medicine, Laiko General Hospital, Athens 11527, Greece
8. Department of Thoracic Surgery, Agios Savvas Hospital, Athens 11522, Greece
9. Unit of Endocrinology and Diabetes Center, Athens Hospital G. Gennimatas, Athens 11527, Greece
10. Intensive Care Unit, Sismanogleio Hospital, Athens 15126, Greece
11. Department of Cytology, Mitera Hospital, Athens 15123, Greece
12. Department of Biochemistry, Sismanogleio Hospital, Athens 15126, Greece
13. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece