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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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People about to have surgery must tell their health care providers about all supplements they take.