Mail questionnaires are very expensive per respondent compared to other survey methods.

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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There are more sensory neurons in the tongue than in any other part of the body.

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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Species-rich floras of chalk grassland compared to species-poor floras of acid soils.

Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s

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Author Question: Mail questionnaires are very expensive per respondent compared to other survey methods. (Read 72 times)

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