[Determination of NPN (BUN)].
D000293:Adolescent; D000328:Adult; D001806:Blood Urea Nitrogen / Q000592:standards*; D002648:Child; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007674:Kidney Diseases / Q000097:blood; D008297:Male; D008875:Middle Aged; D011247:Pregnancy