1. Department of Oncology and Metabolism, University of Sheffield Medical School, Sheffield, UK
2. Department of Health Economics and Decision Science, Sheffield, UK
3. Brighton and Sussex Medical School, Brighton, UK
4. Clinical Trials Research Unit, School for Health and Related Research, ScHARR, University of Sheffield, Sheffield, UK
5. University of Nottingham, Royal Derby Hospital, Derby, UK
6. University of Gothenberg, Sahlgrenska Universitetssjukhuset, Göteborg, Sweden