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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Medication errors are more common among seriously ill patients than with those with minor conditions.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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).