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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

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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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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Energy budget for a temperate deciduous forest (data from Gosz et al. 1978). Energy budget for a temperate deciduous forest (data from Gosz et al. 1978).
Graphing Psychological Data Graphing Psychological Data
How lenses correct visual problems: (A) emmetropia; (B) myopia; (C) hyperopia; (D) corrected myopia; ... How lenses correct visual problems: (A) emmetropia; (B) myopia; (C) hyperopia; (D) corrected myopia; ...
This debutante is making her formal entrance into society, announcing her eligibility for marriage. ... This debutante is making her formal entrance into society, announcing her eligibility for marriage. ...
Replace the canister’s top (making sure it is tight) and connect its hose to the fuel rail ... Replace the canister’s top (making sure it is tight) and connect its hose to the fuel rail ...
Looking carefully at the scan tool data is very helpful in locating the source of a problem. Looking carefully at the scan tool data is very helpful in locating the source of a problem.
Video: Structures that affect circulation - heart and MABP

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