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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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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.