The bacteria that live in your intestines are a mixed blessing. Scientists have known for decades that this so-called microbiota helps us digest our food and crowds out infectious germs. The bugs have also been implicated in allergies and obesity. Now, a new study adds one more potential malady to the list: rheumatoid arthritis. Diane Mathis, the Morton Grove-Rasmussen Professor of Immunohematology at HMS, commented on the study.
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