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National Institute of Environmental Health SciencesNational Institutes of Health
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Join a Health Study or Clinical Trial

The NIEHS supports and conducts studies to determine how exposure to chemicals or other agents in the environment may influence a variety of diseases. The following NIEHS studies are ongoing and currently recruiting participants:

Doctor examining young boy. Dust mite Reduction Study.  Volunteers are needed to participate in a study to help children with dust mite allergies or sensitivities (

Autoimmune Diseases. The NIEHS is recruiting adults and children to participate in a five-year study ( to understand the role that genes and environmental risk factors play in the development of autoimmune diseases, such as rheumatoid arthritis/juvenile rheumatoid arthritis, lupus, scleroderma or myositis.

DNA Registry for Diseases. The Environmental Polymorphism Registry (EPR) ( is a long-term research project to collect DNA samples from up to 20,000 individuals in the greater North Carolina Triangle Region.

Breast Cancer Research.  The NIEHS led Sister Study is a nationwide study of sisters of women who have had breast cancer.  The purpose of the Sister Study is to learn how the environment and genes may interact to affect the chances of getting breast cancer. To volunteer or learn more about the Sister Study, visit the Web site Exit NIEHS, or for Spanish visit ( Exit NIEHS.  A toll free number is also available 1-877-4SISTER (877-474-7837). Deaf/Hard of Hearing call 1-866-TTY-4SIS.

Polycystic Ovary Syndrome in Twin Sisters. The NIEHS is studying polycystic ovary syndrome ( in twins to find out if it is caused by genetics, environmental triggers or a combination of both.

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Last Reviewed: August 13, 2007