An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
We protect our registrants' privacy
Along with the website, newsletters and other materials are a way to keep participants informed of study progress. We have made these available in digital format online for easy access. Please take a moment to look through the previous materials!