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50 HEU individuals and 141 HIV-unexposed controls were included in this analysis. Controls were randomly matched to HEU participants up to 3:1 on age of last encounter (± 2 years), birthdate (± 5 years), sex, race/ethnicity, and zip code. A total of 42 HEU subjects had 3 matched controls, whereas 7 subjects had 2 matched controls and 1 subject had 1 matched control.
