The use of the Allen correction in the quantitative determination of urinary porphobilinogen.
D005260:Female; D006801:Humans; D007982:Levulinic Acids / Q000652:urine; D008297:Male; D008433:Mathematics; D008722:Methods; D011758:Pyrroles / Q000652:urine*
D007982:Levulinic Acids; D011758:Pyrroles