MYCN and neuroblastoma: Our analysis also included two MYCN-amplified neuroblastoma cell lines (SKNBE2 and NB5), and three other cell lines with doxycycline-inducible MYCN transgene; HTB11MYCN (MYCN-nonamplified neuroblastoma cell line with short telomere) and U251MYCN and MOG-U-UVWMYCN (MYCN-non-amplified/non-neuroblastoma cells).