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From the data of more than 40 million births, scientists link paternal age to birth risks and even risks to the mother’s health.

From the data of more than 40 million births, scientists link paternal age to birth risks and even risks to the mother’s health.

Breast cancer in men and women differ in levels of cancer-associated gene expression and the relative risk of recurrence after initially successful treatment. Some men have a higher risk than women, whereas others have a much lower risk.

Breast cancer in men and women differ in levels of cancer-associated gene expression and the relative risk of recurrence after initially successful treatment. Some men have a higher risk than women, whereas others have a much lower risk.