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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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Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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