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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

Internal and External Environment Internal and External Environment
Shope’s Model of Young Driver Crash Risks The model shows that many factors contribute to crash ris Shope’s Model of Young Driver Crash Risks The model shows that many factors contribute to crash ris
Many ideologies stem from older theories. The ideas of the philosophers are simplified. Ideologies Many ideologies stem from older theories. The ideas of the philosophers are simplified. Ideologies
Caregivers’ responses sometimes help a child with strong emotions adapt to the environment. Caregivers’ responses sometimes help a child with strong emotions adapt to the environment.
Preparing a Urine Specimen for Microscopic Examination (for Classroom Evaluation Only) Preparing a Urine Specimen for Microscopic Examination (for Classroom Evaluation Only)
A question for grade 11 math A question for grade 11 math
Video: Conduction of action potentials

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