1. Interstitial Lung Disease Unit; Royal Brompton Hospital; London UK
2. Department of Radiology; Royal Brompton Hospital; London UK
3. Department of Radiology; University Hospital of Wuerzburg; Wuerzburg Germany
4. Clinical Trials Unit; Royal Brompton Hospital; London UK
5. Department of Radiology; King's College Hospital; London UK
6. Interstitial Lung Disease Unit; Department of Thoracic Medicine; Medical School; University of Crete; Heraklion Greece
7. Imperial College; London UK