Which condition results in thick blood as a result of having too many red blood cells?

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Polycythemia vera is a condition in which the body produces too many red blood cells, leading to thickening of the blood. Hemophilia is a genetic disorder that impairs the body's ability to control blood clotting. Hyperlipemia is a condition characterized by high levels of lipids in the blood. Thalassemia is a genetic disorder that affects the production of hemoglobin in red blood cells, leading to anemia. None of these conditions directly lead to thickening of the blood due to an excess of red blood cells.

Which Condition Results in Thick Blood as a Result of Having