- Gain of imprinting at chromosome 11p15: A pathogenetic mechanism identified in human hepatocarcinomas. Schwienbacher, C., Gramantieri, L., Scelfo, R., Veronese, A., Calin, G.A., Bolondi, L., Croce, C.M., Barbanti-Brodano, G., Negrini, M. Proc. Natl. Acad. Sci. U.S.A. (2000)