NRAS and neuroblastoma: We measured the protein expression levels of β-catenin, phosphorylated extracellular regulated protein kinase (p-ERK)/ERK, p-AKT/AKT, p-c-Jun/c-Jun, c-Fos, nuclear factor-κB (NF-κB), caspase-3 and neuroblastoma Ras (N-Ras) and compared them to those of the NC.