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Contrast-enhanced US scans of, A, B, control or, C, D, obese db/db mice before (A, C) and after (B, D) intravenous infusion of BAT-activating factor norepinephrine (NE) show limited BAT activation in db/db mice. Dotted line indicates outline of left BAT lobe. White bar = 2.5 mm. (Reprinted, with permission, from reference 95.)
