| http://www.w3.org/ns/prov#value | - Certain drugs and other compounds introduced into the blood stream can cause this problem.The following values represent the percentage of hemoglobin derivatives based on total hemoglobin:Carboxyhemoglobin: less than 1.5% (but may be as high as 9% in smokers)Methemoglobin: less than 2%Sulfhemoglobin: undetectable Normal value ranges may vary slightly among different laboratories.
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