Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Bland-Altman plot comparing absolute CD4 cell counts estimated by Guava EasyCD4 (PCA) and FACSCount (FCM). The dark continuous line drawn indicates the bias (mean difference), and the dotted lines are the limits of agreement (mean ± 2 SD). Mean, +25; limits of agreement between +75 and −25.
