| Name | Class |
|---|---|
| University Hospital of Patras | OTHER |
| Pulmonary Clinic Aristotle University of Thessaloniki Greece | UNKNOWN |
| Pulmonary Clinic University of Ioannina | UNKNOWN |
| Pulmonary Clinic Democritus University of Thrace | UNKNOWN |
| 2nd Pulmonary Clinic Kapodistrian University of Athens | UNKNOWN |
| University Hospital of Crete | OTHER |
| Pulmonary and Respiratory Failure Department National and Kapodistrian University of Athens | UNKNOWN |