Implications of the PD-1/B7-H1 receptor-ligand system in Alzheimer's Disease - Kummer, M.P; Hermes, M; Hülsmann, C; Hammerschmidt, T; Tatenhorst, L; Terwel, D; Ortler, S; Kroner, A; Wiendl, H; Heneka, M.T (Aktuelle Neurologie, 2008)