Blockade of B7-H1 and PD-1 by monoclonal antibodies potentiates cancer therapeutic immunity. - Hirano,F.; Kaneko,K.; Tamura,H.; Dong,H.; Wang,S.; Ichikawa,M.; Rietz,C.; Flies,DB.; Lau,JS.; Zhu,G.; Tamada,K.; Chen,L. (Cancer Res, 2005)