| http://www.w3.org/ns/prov#value | - Accumulation of urea and other nitrogen-containing substances in the bloodstream lead to a number of symptoms, such as fatigue, loss of appetite, headache, nausea and vomiting.[4] Marked increases in the potassium level can lead to irregularities in the heartbeat, which can be severe and life-threatening.[5] Fluid balance is frequently affected, though hypertension is rare.[6] The construct of ren
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