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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.