1. Sarcoma Molecular Pathology Team; Division of Molecular Pathology and Cancer Therapeutics; The Institute of Cancer Research; London UK
2. Spanish National Cancer Research Centre; Madrid Spain
3. Sarcoma Unit; Royal Marsden NHS Foundation Trust; London UK
4. Children and Young People's Unit; Royal Marsden NHS Foundation Trust; London UK
5. Department of Paediatric Histopathology; Royal Manchester Children's Hospital; Manchester UK