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Contributors DW had the idea for the project. All authors were responsible for the writing of the protocol, reviewing and editing this. SF, CD, NA and DW trained the testers. ST and SF produced a training video for future testers. NB and SF provided testing at PRIDE, and NA organised testing at the Handsworth Carnival. SF, NB and NA data collected and SF and NA performed the analysis. SF wrote the manuscript and all authors edited and reviewed the final version of the manuscript. DW had overall responsibility for the project.
Competing interests None.
Provenance and peer review Not commissioned; internally peer reviewed.