3.1 Study population
In total, 75 patients with newly diagnosed neuroblastoma who met the inclusion criteria during the study period were identified. Table 1 shows the characteristics of the patients at baseline. Thirty-five (46.7%) patients were female, and the median age was 2.7 (IQR 1.3-3.8) years. Most patients had stage IV (85.3%) neuroblastoma and a high risk (86.7%).