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Conditional density plot for trends in antiretroviral treatment (ART) eligibility at enrollment, FGH Nigeria Cohort, 2009–2013. Trends in the proportion of enrollees who are eligible, not eligible, or indeterminately eligible for ART at enrollment based on CD4 count, WHO clinical stage and ART eligibility criteria at time of enrollment. Antiretroviral treatment eligibility criteria change in June 2010 (end of Q2–10).
