National Institute of Environmental Health Sciences   —  National Institutes of Health   —  U.S. Department of Health and Human Services

The Sister Study

About 68% of Sister Study participants have worked outside the home in recent years.


  • Have you moved or changed your telephone number or e-mail address?
  • Have you been diagnosed with cancer or other major illness?
  • Have you had any major injuries or surgeries?
  • Would you like to share any other information with the study?

The Sister Study would like to know about these and other important changes in your health or contact information. Please use this form to send your updates to the Sister Study. Or if you like, you can call us toll-free at 877-4SISTER (877-474-7837) or  e-mail us at, however, be mindful that we cannot protect your personal information via this email format.

If you have been diagnosed with breast cancer or any other type of cancer, please visit our I Was Diagnosed With... page to learn more.

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