Skip to main content
U.S. flag

An official website of the United States government

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.

HTA 101: VII. RETRIEVE EVIDENCE

This page is no longer being maintained.

The content can be found on https://wayback.archive-it.org/org-350/20240307195108/https://www.nlm.nih.gov/nichsr/hta101/ta10109.html

If you’re looking at an archived version of this page and the hyperlink above doesn't work, copy and paste the URL beginning with https://wayback.archive-it.org/ into your browser to go to the link directly.

This page will be deleted on 5/13/2025.

Last Reviewed: October 21, 2021