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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

The epidermal growth factor (EGF) pathway that promotes cell division The epidermal growth factor (EGF) pathway that promotes cell division
They are divided into four classes: all α, all β, α/β, and α + β They are divided into four classes: all α, all β, α/β, and α + β
the transamination product of tryptophan is decarboxylated to yield indole-3-acetic acid, or auxin the transamination product of tryptophan is decarboxylated to yield indole-3-acetic acid, or auxin
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Quadratic Formula Quadratic Formula
How many carboxylic acids and esters share the molecular formula C2H4O2? How many carboxylic acids and esters share the molecular formula C2H4O2?
Video: Homeostasis (range of body conditions, normal limits, mild stresses & severe stresses)

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