The mRNA expression levels of these genes and their association with overall survival in NB were verified using our expression data and two independent NB microarray analysis datasets (Kocak - 649 - custom - ag44kcwolf and SEQC - 498 - RPM - seqcnb1) in the R2: microarray analysis and visualization platform (http://r2.amc.nl), except OR52R1 whose data were absent in one of the datasets. This evidence concerns the gene OR52R1 and neuroblastoma.