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Medication errors are more common among seriously ill patients than with those with minor conditions.

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All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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The human X chromosome (left) and the Y chromosome (right). This false-color scanning electron micro The human X chromosome (left) and the Y chromosome (right). This false-color scanning electron micro
Structural comparison of human blood vessels and the direction of blood flow through them Structural comparison of human blood vessels and the direction of blood flow through them
Human mitochondrial transcription Human mitochondrial transcription
Video: Muscle Fatigue and Recovery

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