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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.