1 Division of Surgery and Interventional Science, University College London, London, UK; Department of Urology, University College London Hospitals NHS Foundation Trust, London, UK; British Urology Researchers in Surgical Training (BURST) Research Collaborative, London, UK. Electronic address: veeru.kasi@ucl.ac.uk.
2 Division of Surgery and Interventional Science, University College London, London, UK; Department of Radiology, University College London Hospitals NHS Foundation Trust, London, UK.
3 Division of Surgery and Interventional Science, University College London, London, UK; Department of Urology, University College London Hospitals NHS Foundation Trust, London, UK; British Urology Researchers in Surgical Training (BURST) Research Collaborative, London, UK; NIHR UCLH/UCL Comprehensive Biomedical Research Centre, London, UK.
4 Division of Surgery and Interventional Science, University College London, London, UK; Department of Urology, University College London Hospitals NHS Foundation Trust, London, UK.