The expression levels were tested on the same RNA samples as used for the microarray analysis for cdh2 (cadherin 2, neuronal, NM_131081), mycn (v-myc, myelocytomatosis viral related oncogene, neuroblastoma derived, NM_212614), erm (ets related protein erm, NM_131205), cfos (FBJ murine osteosarcoma viral oncogene homolog, NM_205569), mos (moloney murine sarcoma viral oncogene homolog, NM_205580), snai1a (snail homolog 1a Drosophila, NM_131066) and vegf (vascular endothelial growth factor A, NM_131408) (Fig. 4). This evidence concerns the gene VEGFA and neuroblastoma.