Monocyte-derived HLA-G, a strong inhibitor of autologous CD4 T-cell activation, is upregulated by interferon-β in vitro and in vivo: rationale for the therapy of multiple sclerosis? - Mitsdörffer, M; Schreiner, B; Kieseier, BC; Neuhaus, O; Dichgans, J; Hartung, HP; Weller, M; Wiendl, H (Aktuelle Neurologie, 2004)