Patients selection
neuroblastoma, death, neuroblastoma or, deaths, ganglioneuroblastoma
ONCOLOGY, DISEASES, NEUROBLASTOMA, GANGLIONEUROBLASTOMA
Patients with neuroblastoma between 2004 and 2015 were selected from the SEER database according to the International Classification of Diseases for Oncology 3rd Edition (ICD-O-3). Inclusion criteria were: (1) age equal to or below 18 years, and (2) diagnosed with neuroblastoma or ganglioneuroblastoma (GNB). Exclusion criteria included: (1) survival time less than 1 month or unknown, (2) deaths attributed to causes other than neuroblastoma or ganglioneuroblastoma or unknown cause of death, (3) uncertainty surrounding whether cancer-directed surgery was performed, and (4) uncertainty regarding whether a surgical procedure other than at the primary site was performed. The selection criteria and screening process are depicted in Fig. Flowchart illustrating the inclusion and exclusion of patients