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There are approximately 3 million unintended pregnancies in the United States each year.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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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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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.