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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.