title: 6-Mercaptopurine-related leucopenia and in vivo xanthine oxidase activity.
mesh_terms: D000328:Adult; D003424:Crohn Disease / Q000188:drug therapy; D005260:Female; D006801:Humans; D007970:Leukopenia / Q000139:chemically induced*; D015122:Mercaptopurine / Q000009:adverse effects*; D014969:Xanthine Oxidase / Q000378:metabolism*
chemical_list: D015122:Mercaptopurine; D014969:Xanthine Oxidase