Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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The diagnosis of ethmoiditis is based on the person's history and a physical exam. Nasal endoscopy, an examination of the back of the nasal cavity using a narrow tool, is especially helpful. A CT scan can also show swelling of the sinuses.