More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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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.
Oasis in space: earthrise over the moon's horizon.
The tenuous atmosphere of Mars, visible on the horizon in this low-orbit photo