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On average, the stomach produces 2 L of hydrochloric acid per day.

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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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