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

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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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The horizontal fraction bar was introduced by the Arabs.

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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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