1. Palliative Care Department, Royal Marsden Hospital, Fulham Road, London SW3 6JJ, UK
2. Division of Medicine, Institute of Cancer Research, 123 Old Brompton Road, London SW7 3RP, UK
3. National Heart and Lung Institute, Imperial College, London SW7 2AZ, UK
4. Sarcoma Unit, Royal Marsden Hospital, Fulham Road, London SW3 6JJ, UK