The GSTP1 rs1695 (A > G) variant was associated with SOS in a study by Krivoy et al. [37] of 63 adult patients undergoing HSCT for acute myeloid leukemia (no OR reported, p = 0.05) but not in other predominantly adult [36,40,52] or pediatric studies [51,53,54]. The gene discussed is GSTP1; the disease is acute myeloid leukemia.