On the cover: Macrophages control the capacity of mesoangioblasts to yield terminally differentiated myotubes. Myogenic differentiation was assessed, verifying by immunofluorescence the expression of MyHC (green). Macrophages were identified by the expression of CD11b (red). Nuclei were counterstained with Hoechst (blue). Bosurgi, L., G. Corna, M. Vezzoli, T. Touvier, G. Cossu, A. A. Manfredi, S. Brunelli, and P. Rovere-Querini. 2012. Transplanted mesoangioblasts require macrophage IL-10 for survival in a mouse model of muscle injury. J. Immunol. 188: 6267–6277.