On the cover: TGF-β1 induces phenotypic transition and migration of mesothelial cells in the context of pleural fibrosis, a process called "mesothelial fibroblastoid transformation." The image shows a rat pleura 7 days after adenoviral gene transfer of TGF-β1 to the pleural mesothelium. Immunofluorescence identifies cells with dual positivity for mesothelial (cytokeratin, green) and myofibroblast-like (α-SMA, red) markers. Decologne, N., M. Kolb, P. J. Margetts, F. Menetrier, Y. Artur, C. Garrido, J. Gauldie, P. Camus, and P. Bonniaud. 2007. TGF-β1 induces progressive pleural scarring and subpleural fibrosis. J. Immunol. 179: 6043–6051.