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*[UAE]: United Arab Emirates
*[UAM]: Unlinked Anonymous Monitoring
*[UII]: Unique Incident Identifier
*[UKCIS]: UK cancer information service
*[UK NSC]: UK National Screening Committee
*[UKHSA]: UK Health Security Agency
*[UKNEQAS]: United Kingdom National External Quality Assessment Service
*[UCL]: University College London
*[UNICEF]: United Nations International Children's Emergency Fund
*[UPF]: ultraviolet protection factor
*[US CDC]: US Center for Disease Control and Prevention
*[UTI]: Urinary tract infection
*[UV]: ultraviolet
*[UPF}: ultraviolet protection factor
*[UVR]: ultraviolet radiation
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