1 Bladder Cancer Research Centre, Institute of Cancer & Genomic Sciences, University of Birmingham, Birmingham, UK.
2 Academic Urology Unit, University of Sheffield, Sheffield, UK; Sheffield Teaching Hospitals NHS Trust, Sheffield, UK.
3 University Hospital Coventry & Warwickshire, Coventry, UK.
4 Bladder Cancer Research Centre, Institute of Cancer & Genomic Sciences, University of Birmingham, Birmingham, UK; University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
5 Institute of Cancer Research, London, UK; The Royal Marsden NHS Foundation Trust, London, UK. Electronic address: nick.james@icr.ac.uk.
6 Cancer Research UK Clinical Trials Unit, Institute of Cancer & Genomic Sciences, University of Birmingham, Birmingham, UK.