Brown JA, Dorfman DM, Ma FR et al.. Blockade of programmed death-1 ligands on dendritic cells enhances T cell activation and cytokine production. J Immunol 2003;170:1257–1266.
Wintterle S, Schreiner B, Mitsdoerffer M et al.. Expression of the B7-related molecule B7-H1 by glioma cells: a potential mechanism of immune paralysis. Cancer Res 2003;63:7462–7467.
Liang SC, Latchman YE, Buhlmann JE et al.. Regulation of PD-1, PD-L1, and PD-L2 expression during normal and autoimmune responses. Eur J Immunol 2003;33:2706–2716.
Chen J, Wang XM, Wu XJ et al.. Intrahepatic levels of PD-1/PD-L correlate with liver inflammation in chronic hepatitis B. Inflamm Res 2011;60:47–53.