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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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Oncogene
Oncogene: A gene that plays a normal role in cell growth and, when altered, may contribute to the growth of a tumor. The word oncogene (literally, cancer gene) is catchy but oversimplifies the complex process of cancer.