GSTM1 and anemia (phenotype): Worsening anemia (Hb 8–8.5 g/dL), no transfusion requirement; lymphopenia (nadir 0.24 x10^9/L); high LDH (1,156 U/L), ferritin (4,120 mcg/L) and D-dimer (48,870 mcg/L)