MYCN and neuroblastoma: Two-sided Pearson’s correlation study showed that JMJD6 mRNA expression positively correlated with N-Myc mRNA expression in the 88 and 476 human neuroblastoma tissues of the Versteeg and Oberthuer datasets (Supplementary Fig. 1a), and that JMJD6 mRNA expression positively correlated with c-Myc mRNA expression in the 405 MYCN-non-amplified human neuroblastoma tissues of the large Oberthuer dataset (Supplementary Fig. 1b).