ISL1 and neuroblastoma: Among the ten different NB-mRNAs, six NB-mRNAs (CHRNA3, DCX, DDC, GAP43, PHOX2B, and TH mRNAs) were common to both non-HR and HR patient samples, while four NB-mRNAs (B4GALNT1, CCND1, CHGA, and ISL1 mRNAs) were specific to HR patient samples.