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There are 60,000 miles of blood vessels in every adult human.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Medication errors are more common among seriously ill patients than with those with minor conditions.

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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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