1. King's College Hospital NHS Foundation Trust, Denmark Hill, Brixton, London SE5 9RS, UK.
2. Royal Brompton and Harefield NHS Foundation Trust, London, UK.
3. Centre for Medical Image Computing, University College London, London, UK.
4. Department of Radiology, University College London Hospital, London, UK.
5. Kingston Hospital NHS Foundation Trust, Kingston on Thames, UK.
6. Department of Radiology, Hospital Erasto Gaertner, Curitiba, Brazil.