G J. Freeman, et.al., Engagement of the PD-1 immunoinhibitory receptor by a novel B7 family member leads to negative regulation of lymphocyte activation., The Journal of experimental medicine, 2000, 192
G J. Freeman, et.al., Engagement of the PD-1 immunoinhibitory receptor by a novel B7 family member leads to negative regulation of lymphocyte activation., The Journal of experimental medicine, 2000, 192