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.
Plot of cerebrospinal fluid (CSF) tau concentration versus CSF amyloid-β 1 to 42 peptide (Aβ1-42) concentration for the Alzheimer’s Disease Neuroimaging Initiative (ADNI) probable Alzheimer’s disease (AD; solid circles), mild cognitive impairment (MCI; squares), and elderly cognitively normal (NC; open circles) subjects.
