1. Pulmonology Department, Laiko General Hospital, 11527 Athens, Greece
2. 1st Pulmonology Department, Sismanogleio Hospital, 15126 Athens, Greece
3. Unit of Endocrinology, First Department of Internal Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
4. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
5. Renal Transplantation Unit, Laiko General Hospital, 11527 Athens, Greece
6. First Department of Internal Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
7. Department of Thoracic Surgery, Agios Savvas Hospital, 11522 Athens, Greece
8. Department of Cytology, Mitera Hospital, 15123 Athens, Greece
9. Department of Biochemistry, Sismanogleio Hospital, 15126 Athens, Greece