MYCN and Mobius syndrome: In Group 4 MBs, EIF4EBP1 mRNA expression was not correlated with MYC mRNA expression ([r] 0.118, p value < 0.01; Supplementary Fig. 1I; [r] 0.194, p value = n.s.; Supplementary Fig. 1J), but strongly associated with MYCN mRNA expression ([r] 0.534, p value < 0.0001; Supplementary Fig. 1K; [r] 0.507, p value < 0.0001; Supplementary Fig. 1L), consistent with MYCN amplification being a common hallmark feature of this MB group [5].