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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.

NLM Main Site Coding Examples - Using A Breadcrumb Header - Roger verifying behavior

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Last Reviewed: July 27, 2023