In the univariate analysis, the AMC < 400/μl, AMC × ALC < 1 × 106 (/μl)2, Hb < 10 g/dl, and ferritin ≥ 350 ng/ml were significant risk factors for poorer PFS among patients with high-risk neuroblastoma (Table 2). Here, GSTM1 is linked to neuroblastoma.