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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Leukoplakia is diagnosed mainly by its appearance. The healthcare provider will often rub or scrape the area to see if it comes off. If the lesion comes off with simple rubbing or scraping, it is not leukoplakia.