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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

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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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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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