Do Migraines Lower Breast Cancer Risk?

From Scientific American:

There may be an upside for migraine sufferers. New research indicates that women with a history of the blinding headaches may be as much as 30 percent less likely to develop breast cancer than their headache-free friends. One possible glitch: the data doesn't rule out that nonsteroidal anti-inflammatory drugs (NSAID) such as ibuprofin - and not the migraines - deserve the credit.

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