Xenotransplanted embryonic kidney provides a niche for endogenous mesenchymal stem cell differentiation into erythropoietin-producing tissue - Matsumoto, K; Yokoo, T; Matsunari, H; Iwai, S; Yokote, S; Teratani, T; Gheisari, Y; Tsuji, O; Okano, H; Utsunomiya, Y; Hosoya, T; Okano, H J; Nagashima, H; Kobayashi, E (Stem Cells, 2012)