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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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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Chronic Renal Failure Chronic Renal Failure
The injector on-time is called the pulse width. The injector on-time is called the pulse width.
Lungs showing appearance of acute histoplasmosis infection. Lungs showing appearance of acute histoplasmosis infection.
Anatomy of the Stomach Anatomy of the Stomach
A deficiency of linoleic acid can interfere with normal growth and result in inflammation A deficiency of linoleic acid can interfere with normal growth and result in inflammation
Acute glaucoma Acute glaucoma
Video: Dendrite Animation

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