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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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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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The average adult has about 21 square feet of skin.

A closed circulatory system. A closed circulatory system.
A review of photosynthesis. A review of photosynthesis.
Crocodiles leave distinctive bite marks that reflect the shape of their teach. Crocodiles leave distinctive bite marks that reflect the shape of their teach.
A farmer with a pitchfork, wearing a hat identifying him as a Granger, warns of an oncoming “Consoli A farmer with a pitchfork, wearing a hat identifying him as a Granger, warns of an oncoming “Consoli
Measure between terminal 30 and 87a. Terminal 87a is the normally closed contact, and there should ... Measure between terminal 30 and 87a. Terminal 87a is the normally closed contact, and there should ...
When the engine is cold and before the oxygen sensor is hot enough to achieve closed-loop, the ... When the engine is cold and before the oxygen sensor is hot enough to achieve closed-loop, the ...
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