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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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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.

Although Tasmanian devils are nocturnal, they like to rest in the sun. Scarring from fighting is vis Although Tasmanian devils are nocturnal, they like to rest in the sun. Scarring from fighting is vis
Normal glomerulus. Acute glomerulonephritis. Normal glomerulus. Acute glomerulonephritis.
Hypertroph​ic scarring Hypertroph​ic scarring
Diagram of the Glomerulus Diagram of the Glomerulus
Fates of drugs entering the glomerulus: filtration, reabsorption, secretion, and excretion. Fates of drugs entering the glomerulus: filtration, reabsorption, secretion, and excretion.
(A) Normal glomerulus and (B) acute glomerulonephritis. (A) Normal glomerulus and (B) acute glomerulonephritis.
Video: Effect of blood chemistry - stimuli, hyperventilation response and hypoventilation response

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