In cultured NB cell lines SK‐N‐BE(2), IMR‐32, SH‐SY5Y, and SK‐N‐AS, endogenous RORB enrichment was validated at promoter regions of NR1D1 and RIOK3, but not of FLCN and FNIP1 (Figure 3A; Figure S4A, Supporting Information). This evidence concerns the gene NR1D1 and neuroblastoma.