MEDAL, he says, should be "terrific" for demonstrating whether a more powerful Cox-2 inhibitor confers more risk to the heart than a weaker one.

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Two centuries before Rand arrived on the scene, Adam Smith had already written The Wealth of Nations, a powerful treatise demonstrating why self-interest offers a more secure foundation for a rational society than a selfless dedication to the common good.

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These distant contacts are also more likely to share novel information, demonstrating that social networks can act as a powerful medium for sharing new ideas, highlighting new products and discussing current events.

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