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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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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.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.