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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.