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The horizontal fraction bar was introduced by the Arabs.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.