MZF1 and neuroblastoma: Pre-clinically, administration of a cell-penetrating MZF1-uPEP or lentivirus over-expressing MZF1-uPEP significantly suppresses aerobic glycolysis, tumorigenesis and aggressiveness, indicating the crucial roles of MZF1-uPEP in repressing YY1/MZF1 axis during NB progression.