Savarese TM, Jang T, Low HP, Salmonsen R, Litofsky NS, Matuasevic Z, Ross AH, Recht LD. Isolation of immortalized, INK4a/ARF-deficient cells from the subventricular zone after in utero N-ethyl-N-nitrosourea exposure. J Neurosurg. 2005 Jan; 102(1):98-108.