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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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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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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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Your heart beats over 36 million times a year.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.