H. Kaplan-Meier relapse free (RF) and event free (EF) survival probability curves from two different NB cohorts, the Versteeg 88 cohort (upper panel) and the Kocak 649 cohort (lower panel), as derived from the R2 platform. Patients with higher VGF expression are highlighted in blue, whereas patients with lower expression are highlighted in red. The log-rank test P values are indicated. 