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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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The familiar sounds of your heart are made by the heart's valves as they open and close.

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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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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

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Video: Deafness Culture

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