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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

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The horizontal fraction bar was introduced by the Arabs.

When the United States gets stuck over a controversial issue—usually something a divided Congress ca When the United States gets stuck over a controversial issue—usually something a divided Congress ca
This girl ran four spinning machines in a cotton mill in Whitnel, North Carolina. Only 4 feet, 3 inc This girl ran four spinning machines in a cotton mill in Whitnel, North Carolina. Only 4 feet, 3 inc
Early in the twentieth century, when malnutrition was common, companies such as this one advertised Early in the twentieth century, when malnutrition was common, companies such as this one advertised
Acid Rain and Power Plant Emissions Acid Rain and Power Plant Emissions
How to evaluate limits using algebra and the limit laws (Part 2) How to evaluate limits using algebra and the limit laws (Part 2)
Drawing of Central PompeII In Its Current State Drawing of Central PompeII In Its Current State
Video: Introduction to Sleep Apnea

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