FEV and melanoma: Using the R2 database (http://r2.amc.nl), we examined expression of FEV, GATA2, and GATA3 TFs in 24 human neuroblastoma lines (GEO accession GSE28019), retinoic acid-treated human SH-SY5Y neuroblastoma cells [107], alongside human neural progenitors [108] and melanoma lines as comparators [109], confirming neuroblastomas strongly express all three of these TFs (Supplemental Figure S5).