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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.