{"TPMT": "Moderate to high concentrations of TGN metabolites; but note that TGN after thioguanine are 5-10X higher than TGN after mercaptopurine or azathioprine. Increased risk of thiopurine-related leukopenia, neutropenia, myelosuppression", "NUDT15": "Normal risk of thiopurine-related leukopenia, neutropenia, myelosuppression"}