[Study of urinary porphyrin and its precursors in children. 1. Fractionation of porphyrin by ion exchange resin column chromatography].
D002648:Child; D002675:Child, Preschool; D002852:Chromatography, Ion Exchange; D006801:Humans; D007475:Ion Exchange Resins; D008722:Methods; D011166:Porphyrins / Q000652:urine*
D007475:Ion Exchange Resins; D011166:Porphyrins