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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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More than 4.4billion prescriptions were dispensed within the United States in 2016.

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Cyanide works by making the human body unable to use oxygen.

An analogy for how cardiac output, resistance, and blood pressure are related. An analogy for how cardiac output, resistance, and blood pressure are related.
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A mini clamp-on digital multimeter can be used to measure alternator output and unwanted AC current ... A mini clamp-on digital multimeter can be used to measure alternator output and unwanted AC current ...
Calculator Output Calculator Output
Intraaortic balloon pump. The balloon deflates during systole, so cardiac output is unimpeded. Intraaortic balloon pump. The balloon deflates during systole, so cardiac output is unimpeded.
Use of synthetic mRNAs to determine genetic code possibilities Use of synthetic mRNAs to determine genetic code possibilities
Video: Mitosis step-by-step

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