1. Department of Psychology; University of Sheffield; Sheffield United Kingdom
2. Department of statistics, Management School; Conduit Road; University of Sheffield; Sheffield United Kingdom
3. Department of Paediatric Haematology; Sheffield Children's NHS Foundation Trust, Western Bank; Sheffield United Kingdom
4. Department of paediatric haematology; Great Ormond Street Hospital; London United Kingdom
5. Department of Paediatric Haematology/Oncology; John Radcliffe Hospital; Oxford United Kingdom
6. Clinical Trial Service Unit; University of Oxford; Oxford United Kingdom
7. Department of Paediatric Oncology, Children's Hospital for Wales; Heath Park; Cardiff United Kingdom