L Quartuccio, V De Re, M Fabris, A Marzotto, N Franzolini, D Gasparotto, L Caggiari, G Ferraccioli, CA Scott, S De Vita. Atypical lymphoproliferation progressing into B-cell lymphoma in rheumatoid arthritis treated with different biological agents: clinical course and molecular characterization. Haematologica 2006;91(5):691-694; https://doi.org/10.3324/%x.