elizabeth loder, md, professor of neurology, harvard medical school; chief, division of headache, brigham & women's hospital.
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twins linus, left, and maarten have more sweat glands and tooth precursors than their older brother joshua, 5, after being treated with a drug in utero.
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walter reed national military medical center in bethesda, maryland, would not give any details about why the first lady was still there.
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