MYC and neuroblastoma: SK-N-DZ is a MYCN-amplified NB cell line with overexpression of N-Myc oncoprotein, whereas SK-N-AS is a MYCN-non-amplified NB cell line reported to exhibit high expression of c-Myc (Hossain et al., 2013; Puissant et al., 2013; Toyoshima et al., 2012).