SDF-1/CXCL12 production by mature dendritic cells inhibits the propagation of X4-tropic HIV-1 isolates at the dendritic cell-T-cell infectious synapse. - González, N; Bermejo, M; Calonge, E; Jolly, C; Arenzana-Seisdedos, F; Pablos, J; Sattentau, Q; Alcamí, J (Journal of virology, 2010)