RARB and neuroblastoma: In the seven neuroblastoma cell-lines analyzed hypermethylation was present in BLU, CASP8, DCR2, CDH1, RASSF1A and RASSF2, but was not observed for APC, DAPK1, NORE1A, P14, P16, TP73, PTEN or RARB (Table2).