A pie chart shows a comparison among related data.

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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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Procedures and Diagnostic Tests Related to the Endocrine System

Pelli-Robson contrast sensitivity chart.

Estimated age-related changes in semantic and episodic memory abilities. Semantic memory abilities ...

How to calculate the mean for grouped data

Comparison of E-type Climates

Section of a normal brain (left) and an HD brain (right). The HD brain shows extensive damage to the

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