At baseline, 88% of cases presented with thrombocytopenia (PLT < 100  ×  10^9/L; 70% < 50  ×  10^9/L, 22% <20 × 10^9/L), 57% with anemia (Hb <10 g/dL; 16% <8 g/dL), and 34% with neutropenia (ANC < 1 × 10^9/L, 8% <0.5 × 10^9/L). This evidence concerns the gene GSTM1 and neutropenia.