Mutation Analysis of TET2 Reveals the Clonal Nature of Refractory Anemia with Ring Sideroblasts - Malcovati, L; Brisci, A; Galli, A; Bruno, F; Travaglino, E; Pellagatti, A; Della Porta, MG; Ferrari, M; Boultwood, J; Cremonesi, L; Hellstrom-Lindberg, E; Cazzola, M (2010)