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.
Plots of means and standard errors for: (A) the median percent signal change due to the breath hold task in the visual cortex ROI, and (B) residual median percent signal change after regressing median percent signal change due to the VA task onto the breath hold response in the visual cortex. Data are displayed in 3 panels: by diagnosis (Panel 1), by smoking group (Panel 2), and for all four groups (Panel 3)./
