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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Diagnosis is usually based on the medical history and physical exam. Figuring out the cause also often requires
further tests. These may include blood tests, cranial CT scan, and cranial MRI scan. Other special testing may be needed in some cases.