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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.