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Presence of SCAs, ATRX deletion, and TERT gain within groups by age and stage. Presence of segmental chromosomal alterations (SCAs) that were associated with a significantly lower event-free (EFS) and overall survival (OS) in a univariate analysis within groups differentiated by age (≤/>12 months) and stage by International Neuroblastoma Staging System (INSS) (localized/4S or stage 4).
