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Portrait of an older man deep in thought

Media Folder

2021

Title

Portrait of an older man deep in thought

Caption

A study suggests that the drug sildenafil may help prevent Alzheimer’s disease.

Credit

Ruslan Huzau / Shutterstock

Description

Portrait of an older man deep in thought
OD

Site_Section

NIH Research Matters

Alt Text

Portrait of an older man deep in thought