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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.