MYCN and neuroblastoma: The in vitro cytotoxicity of these 14 compounds were measured by cell viability assays using Alamar Blue in MYCN amplified human neuroblastoma (SK-N-BE(2)-C and Kelly) cell lines compared to non-malignant (WI-38, MRC-5) myofibroblast cell lines (Figure 1B,C and Supplementary Figure S1A).