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Author Question: One of the major limitations of observational research methods is that ____. a. they are not cost ... (Read 36 times) |
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There are 60,000 miles of blood vessels in every adult human.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Excessive alcohol use costs the country approximately $235 billion every year.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.