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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

These species are all at risk of extinction. Species with “slow” life-h These species are all at risk of extinction. Species with “slow” life-h
Orcinus citoniensis fossil, an extinct species of the same genus, Museo Capellini di Bologna Orcinus citoniensis fossil, an extinct species of the same genus, Museo Capellini di Bologna
Drugs and Human Behavior Drugs and Human Behavior
Human embryo shortly after fertilization in the laboratory Human embryo shortly after fertilization in the laboratory
Human Lungs (Respiratory System) Human Lungs (Respiratory System)
Human Progeroid Conditions Human Progeroid Conditions
Video: Supine Position

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