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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Legge-Calve-Perthes disease usually causes pain in the thigh and groin. The pain may go down the front of the thigh to the knee. Movement of the hip may be restricted and painful, especially when the person spreads his or her legs apart.