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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Polyps and polyposis. A polyp is a protruding growth from a mucous membrane lining a hollow organ. I Polyps and polyposis. A polyp is a protruding growth from a mucous membrane lining a hollow organ. I
Communicating Effectively with the Elderly Communicating Effectively with the Elderly
When does old age begin? And what activities are appropriate for the elderly? From this photo that I ... When does old age begin? And what activities are appropriate for the elderly? From this photo that I ...
Neuronal and transneuronal degeneration following axotomy. Neuronal and transneuronal degeneration following axotomy.
Estimated number of new HIV infections per year over time period in Canada Estimated number of new HIV infections per year over time period in Canada
MRI scans of normal elderly person compared to one with Alzheimer's MRI scans of normal elderly person compared to one with Alzheimer's
Video: Genetics of Cancer

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