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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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On average, the stomach produces 2 L of hydrochloric acid per day.

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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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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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Video: Introduction to Sickle Cell Anemia

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