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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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Valsalva maneuver
Valsalva maneuver: A maneuver in which one tries with force to exhale with the glottis closed (closing the windpipe). This impedes the return of venous blood to the heart. Named for Antonio Maria Valsalva, an Italian anatomist (1666-1723).