Highly variable neural involvement in sphingomyelinase-deficient Niemann-Pick disease caused by an ancestral Gypsy mutation

V. Mihaylova, J. Hantke, I. Sinigerska, S. Cherninkova, M. Raicheva, S. Bouwer, R. Tincheva, D. Khuyomdziev, J. Bertranpetit, David Chandler, Dora Angelicheva, I. Kremensky, P. Seeman, I. Tournev, Luba Kalaydjieva