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Sister Study Includes Sister of Men

April 2006

No gender bias here: the NIEHS Sister Study, which is studying women who do not have breast cancer but who have a sister with breast cancer, includes in the study those women who have a brother with breast cancer. Dale Sandler, chief of the epidemiology branch at NIEHS and principal investigator for the study, said that recruitment messages focus on women for simplicy's sake, but that women who have a brother with breast cancer are also eligible to join the study.

The Sister Study will follow 50,000 women to get insights into the gene-environment interactions that contribute to breast cancer. Sisters of men with breast cancer may also share a familial risk of getting the disease.

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