Matoba S, Inoue K, Kohda T, Sugimoto M, Mizutani E, Ogonuki N, Nakamura T, Abe K, Nakano T, Ishino F, Ogura A. RNAi-mediated knockdown of Xist can rescue the impaired postimplantation development of cloned mouse embryos. Proc. Natl. Acad. Sci. U.S.A. 2011 Nov 07;108(51):20621–6. doi: 10.1073/pnas.1112664108.