1. Department of Respiratory Medicine University Hospital of Patras Patras Greece
2. Department of Internal Medicine Nicosia General Hospital Nicosia Cyprus
3. Department of Internal Medicine University Hospital of Patras Patras Greece
4. York Teaching Hospital NHS Foundation Trust York UK
5. Intensive Care Unit University Hospital of Patras Patras Greece
6. Department of Cardiology University Hospital of Patras Patras Greece
7. Department of Cardiology Queen Elizabeth Hospital Birmingham UK