1. Radiology Department, King's College Hospital NHS Foundation Trust, Denmark Hill, London SE5 9RS, United Kingdom.
2. 1st Respiratory Department of the National and Kapodistrian University of Athens, “Sotiria” General and Chest Diseases' Hospital, Athens, Greece.
3. Radiology Department, St George's University Hospitals NHS Foundation Trust, London, United Kingdom.
4. Department of Cardiothoracic Surgery, St George's University Hospitals NHS Foundation Trust, London, United Kingdom.
5. Department of Thoracic Radiology, Division of Diagnostic Imaging, University of Texas MD Anderson Cancer Center, Houston, TX.