StoneChecker for kidney stone evaluation

Helen Cui, urology registrar, Oxford University Hospital NHS Foundation Trust, was involved in developing technology.

Michael Kimuli, urology consultant, Leeds Teaching Hospital, did not declare any interests.

Hrishi Joshi, urological surgeon, University Hospital of Wales, consultancy in the commercial healthcare sector.

Robin Cleveland, professor of engineering science, University of Oxford, consultancy in the commercial healthcare section, and co-author of Cui et al. 2017.

Ese Adiotomre, consultant radiologist, Leeds Teaching Hospital NHS trust, did not declare any interests.

Julian Keanie, consultant uroradiologist, Western General Hospital, Edinburgh, did not declare any interests.